new ebony blade has 3 magic effect
health absorption: Same in first 10 friends killed, and add 10 points per 5 friends killed
stamina absorption: appear at 5 friends killed  10 points.  add 10 points per 5 friends killed
Fire damage: appear at 10 friends killed 20 points.  add 15 points per 5 friends killed 

Applying this mod doesn't change the MaxFriendskilled_var in existing saves.
So you may start a new game 

or use Savetool
Search script Da08ebonybladetrackingscript
and change ::MaxFriendskilled_var  to 30

To check how many friends you killed and the max count

type in 
sqv da08ebonybladetracking
in console

and check 
::FriendsKilled_var
::MaxFriendsKilled_var

Feel free to use or edit my file