Ginmarha, the Ebonblade

Whenever Ginmarha, the Ebonblade deals
combat damage to a player, search your library
for a Curse aura and attach it to that player.
Creatures your oppenents control cannot block
unless the controller pays {x}, where X is the
number of Curse auras attached to that player.
The more her blade strikes your flesh, the more it
hungers for your soul.