This is a full list of changes this mod makes (at cards) compared to the vanilla gwent, including a descritpion of their new abilities.
Notice:

• Some of these changes are already planed to be changed during the next update. However, here's only written how the cards are right now.
• Most names of the cards are shortend in this list, since I didn't want to google the complete name of every card. If there's something unclear, just say it and I will update the name :)
• When I write that some card got the buff ability, I mean by this the abillity to give every card in the row +1 power
• When I write that some card boosts some other cards, I mean by this that those cards get the x2 power boost for every other (listed) card on the field.
  

• Geralt
  
  • Added meele scorch
    
• Vesemir
  
  • Increased power to 9
  • Added buff ability
    
• Yennefer
  
  • Increased power to 12
    
• Ciri
  
  • Increased power to 16
  • Added buff ability
    
• Triss
  
  • Increased power to 9
  • Changed type to ranged
  • Added ranged scorch
    
• Dandelion
  
  • Increased power to 2
  • Changed type to ranged
  • Added ability to summon Zoltan
    
• Zoltan
  
  • Increased power to 7
  • Added ability to summon:
    
    • Dandelion
    • Yarpen
    • Sheldon
      
• Regis
  
  • Increased power to 9
  • Changed to hero
  • Added ability to summon himself in his vampire form on death
    
    • Has a power of 16
    • Is a melee hero
    • Has no abilities
      
• Villentretenmerth
  
  • Increased power to 12
  • Changed to be a hero
  • Changed to be siege
  • Changed mele scorch to siege scorch
    
• Avallach
  
  • Increased power to 1
  • Changed to be ranged
    
• Olgierd
  
  • Increased power to 7
  • Changed to be a hero
  • Changed to be melee only
  • Added ability to summon a weaker version of himself on death (has still buff ability)
    
    • Has a power of 7
    • Is a melee hero
    • Has buff ability
    • Can not summon itself again (not allowed by the game...)
      
• Gaunter O'Dimm
  
  • Increased power to 15
  • Changed to be a hero
    
• Gaunter O'Dimm (Dark side)
  
  • Changed to be melee
    
• Cow
  
  • Changed to be melee
    

• Vernon Roche
  
  • Added ability to summon Ves
    
• Natalis
  
  • Added horn ability
    
• Esterad Thyssen
  
  • Decreased power to 8
  • Changed to be siege
  • Added buff ability
    
• Philippa Eilhart
  
  • Increased power to 12
  • Added ability to summon:
    
    • Sile de Tancerville
    • Sabrina Glevissig
      
• Thaler
  
  • Increased power to 2
    
• Ves
  
  • Decreased power to 4
  • Added ability to boost blue stripes
    
• Siegfried
  
  • Increased power to 8
  • Added buff ability
    
• Yarpen
  
  • Moved to scoiatel deck
  • Increased power to 6
  • Added ability to summon:
    
    • Zoltan
    • Sheldon
      
• Keira
  
  • Increased power to 8
  • Added nurse ability
    
• Sile de Tancerville
  
  • Increased power to 10
  • Added ability to summon:
    
    • Philippa Eilhart
    • Sabrina Glevissig
      
• Sabrina Glevissig
  
  • Increased power to 9
  • Added ability to summon:
    
    • Philippa Eilhart
    • Sile de Tancerville
      
• Sheldon
  
  • Moved to scoiatel deck
  • Increased power to 7
  • Changed to be melee
  • Added ability to summon:
    
    • Zotaln
    • Yarpen
      
• Stennis
  
  • Removed spy ability
  • Added buff ability
    
• Threbuchet
  
  • Increased power to 8
    
• Poor Infantry
  
  • Has now three different pictures
    
• Crinfried
  
  • Decreased power to 4
  • Changed to be melee
    
• Redanian
  
  • Increased power to 2
  • One of them got buff ability
    
• Catapult
  
  • Decreased power to 7
  • Removed boost ability
    
• Ballista
  
  • Decreased power to 5
    
• Kaedweni Siege
  
  • Increased power to 2
  • Removed buff ability
  • Gave all the same image
    
• Blue Stripes
  
  • Used alternative artwork
  • Changed boost ability to boost with Ves instead of other blue stripes
    
• Siege Tower
  
  • Decreased power to 4
  • Added ability to summon Kaedweni Siege
    
• Dun Banner Medic
  
  • Decreased power to 1
    

• Letho
  
  • Increased power to 13
  • Added melee scorch
    
• Menno Coehoorn
  
  • Changed nurse ability to horn ability
    
• Moorvran
  
  • Decreased power to 9
  • Added horn ability
    
• Tibor
  
  • Decreased power to 9
  • Changed to be melee
  • Added buff ability
    
• Albrich
  
  • Increased power to 6
    
• Assire var Anahid
  
  • Increased power to 9
  • Added ability to boost Fringilla Vigo
    
• Cynthia
  
  • Increased power to 5
  • Changed to be a spy
    
• Fringilla Vigo
  
  • Increased power to 8
  • Added ability to boost Assire var Anahid
    
• Morteisen
  
  • Increased power to 7
  • Added buff ability
    
• Rainfarn
  
  • Increased power to 6
    
• Rotten Mangonel
  
  • Increased power to 6
    
• Shilard
  
  • Decreased power to 6
  • Changed to be siege
    
• Stefan
  
  • Decreased power to 5
    
• Sweers
  
  • Increased power to 5
  • Changed to be melee
    
• Vanhemar
  
  • Increased power to 6
    
• Vattier
  
  • Decreased power to 3
    
• Vreemde
  
  • Increased power to 7
  • Added buff ability
    
• Cahir
  
  • Increased power to 8
  • Added buff ability
    
• Puttkammer
  
  • Decreased power to 1
  • Changed to be melee
    
• Archer Support
  
  • Increased power to 2
  • Removed nurse ability
  • Added ability to boost itself
    
• Black Archer
  
  • Decreased power to 5
    
• Heavy Zerri
  
  • Decreased power to 7
    
• Zerri
  
  • Increased power to 6
    
• Nausicca
  
  • Increased power to 4
  • Gave other Artwork
    
• Combat Enginee
  
  • Decreased power to 2
  • Added buff ability
    
• Young Emissary
  
  • Decreased power to 2
    
• Siege support
  
  • Increased power to 1
    

• Eithne
  
  • Decreased power to 8
  • Added buff ability
    
• Saskia
  
  • Increased power to 12
  • Changed to be melee
  • Added melee scorch
    
• Isengrim
  
  • Changed buff ability to horn ability
    
• Iorveth
  
  • Changed to be melee or ranged
  • Added ability to summon Ciaran
    
• Dennis
  
  • Decreased power to 3
  • Changed to be siege
  • Added buff ability
    
• Milva
  
  • Decreased power to 7
  • Removed buff ability
  • Added ranged scorch
    
• Ida
  
  • Increased power to 9
  • Added nurse ability
    
• Filavandrel
  
  • Increased power to 10
  • Changed to be a hero
  • Changed to be ranged only
  • Added horn ability
    
• Yaevinn
  
  • Decreased power to 5
  • Changed to be melee only
  • Added ability to boost elf skirmishers
    
• Toruviel
  
  • Increased power to 5
  • Added ability to boost dol scouts
    
• Riordian
  
  • Increased power to 8
  • Added buff ability
    
• Ciran
  
  • Increased power to 6
    
• Barclay
  
  • Increased power to 8
  • Changed to be melee only
  • Added ability to boost mahakam defenders
    
• Havcaaren Support
  
  • Dcreased power to 2
    
• Vrihedd Brigade
  
  • Decreased power to 4
  • Changed to be melee only
  • Added ability to boost itself
    
• Dol Scout
  
  • Decreased power to 2
  • Changed to be melee only
  • Added ability to summon and boost Toruviel
    
• Dwarf
  
  • Increased power to 4
  • Added ability to boost itself
    
• Mahakam defender
  
  • Decreased power to 3
  • Changed to be siege
  • Added ability to summon and boost Barclay
    
• Elf Skirmisher
  
  • Increased power to 3
  • Changed to summon and boost Yaevinn instead of itself
    
• Vrihedd Cadet
  
  • Changed to be melee or ranged
    
• Dol Archer
  
  • Increased power to 5
    
• Havcaaren Medic
  
  • Increased power to 1
  • Changed to be siege
    
• Schirru
  
  • Decreased power to 6
  • Removed siege scorch
  • Changed to be a spy
    

• Draug
  
  • Increased power to 14
  • Changed to be siege
  • Added horn ability
    
• Kayran
  
  • Increased power to 14
  • Changed to be ranged only
  • Removed buff ability
    
• Imlerith
  
  • Increased power to 13
  • Added buff ability
    
• Leshen
  
  • Decreased power to 9
  • Changed to be no hero
  • Added ability to summon werewolfs
    
• Forktail
  
  • Increased power to 9
    
• Earth Elemental
  
  • Added ability to boost:
    
    • Itself
    • Fire Elemental
      
• Fiend
  
  • Increased power to 10
  • Added melee scorch
    
• Plague Maiden
  
  • Increased power to 6
    
• Griffin
  
  • Increased power to 8
  • Changed to be ranged
    
• Werewolf
  
  • Increased power to 6
    
• Botchling
  
  • Increased power to 5
    
• Frightener
  
  • Increased power to 12
  • Changed to be a hero
    
• Ice giant
  
  • Increased power to 9
  • Added buff ability
    
• Harpy
  
  • Added ability to boost:
    
    • Itself
    • Celaeno Harpy
      
• Cockatrice
  
  • Increased power to 7
    
• Gargoyle
  
  • Increased power to 7
  • Changed to be ranged, siege or melee
    
• Celaeno Harpy
  
  • Increased power to 3
  • Added ability to boost:
    
    • Itself
    • Harpy
      
• Grave Hag
  
  • Added nurse ability
    
• Fire elemental
  
  • Increased power to 7
  • Added ability to boost:
    
    • Itself
    • Earth Elemental
      
• Fogling
  
  • Increased power to 4
    
• Wyvern
  
  • Increased power to 8
    
• Arachas Behemoth
  
  • Increased power to 8
    
• Arachas
  
  • Decreased power to 2
  • Added ability to summon Arachas Behemoth
    
• Ekkima
  
  • Increased power to 5
  • Removed summon ability
    
• Fleder
  
  • Removed summon ability
    
• Garkain
  
  • Removed summon ability
    
• Bruxa
  
  • Increased power to 6
  • Removed summon ability
    
• Katakan
  
  • Increased power to 6
  • Sidenode: Still summons all other vamipres ;)
    
• Ghoul
  
  • Increased power to 3
    
• Crone Brewess
  
  • Increased power to 8
  • Changed to be ranged
    
• Crone Weavess
  
  • Increased power to 8
  • Changed to be ranged
    
• Crone Whispess
  
  • Increased power to 8
  • Changed to be ranged
    
• Toad
  
  • Increased power to 10
    

• Kambi
  
  • Changed card that is summoned on death
    
    • Increased power to 15
      
• Hjalmar
  
  • Changed to be melee
  • Added ability to summon clan drummond shieldmaidens
    
• Cerys
  
  • Removed summon ability
  • Added buff ability
    
• Ermion
  
  • Removed mushroom ability
  • Added ranged scorch
  • Added ability to summon druids (actually, the druids are not yet implemented...)
    
• Holger Blackhand
  
  • Increased power to 7
  • Added ability to summon light Drakkar
    
• Donar an Hindar
  
  • Increased power to 5
  • Added nurse ability
    
• Udalryk
  
  • Changed to be a spy
    
• Birna Bran
  
  • Increased power to 4
  • Changed to be ranged
    
• Blueboy Lugos
  
  • Added melee scorch
    
• Olaf
  
  • Increased power to 14
  • Added ability to boost berserker bear
    
• Berserker
  
  • Increased power to 6
  • Changed to be melee or ranged
    
• Berserker bear
  
  • Increased power to 16
  • Added ability to boost Olaf
    
• Young berserker
  
  • Increased power to 4
  • Changed to be melee
    
• Young berserker bear
  
  • Increased power to 10
    
• Clan Heymaey Skald
  
  • Added horn ability
    
• Light Drakkar
  
  • Added ability to summon Holger Blackhand
    
• Clan Brokvar Archer
  
  • Added ability to summon himself