Furgul, Quag Nurturer
Legendary Creature — Elf Shaman2/4
At the beginning of your end step, conjure a card named Slimy Dualleech onto the battlefield if you control no Leeches. Otherwise, put a +1/+1 counter on each Leech you control. , Sacrifice a creature: Add an amount of equal to the sacrificed creature's power.
Not legal in Commander