Master Assasins Daggerhttp://www.hiveworkshop.com/forums/icons-541/btncrruneblades-172650/?prev=r%3D20%26page%3D35requires:
Ninjas Left Dagger:
+50 Damage, +30% Att Speed
Ninjas Right Dagger:
+50 Damage, +30% Crit Damage
Master Assasins Dagger:
+150 Damage, +30 %Attack Speed, +40% Crit Damage
Passive: Cursed Blade:
each succesfull attack steals 1 point Damage from the attacked ennemy and adds it to ur Damage. Lasts 45 sec.
notes: I dont know how easy or hard this is to code, but the main purpose on this item is to weaken bosses while buffing yourself with the "leeched" damage. Benefits would be smaller against minor creeps ofc.
Edit2:
Maybe the passive could also be changed on something like this:
When attacking, every 10% missing max hp (of the ennemy) gives you 10% Damage Bonus. Stacks up to 5 times. Lasts 60 sec.