CardName: Istvan's Ghoul
Cost: B
Type: Creature - Zombie
Pow/Tgh: 2/2
Rules Text: When you control another creature, sacrifice that creature.
Flavour Text:
Set/Rarity: [Assorted] Card Repository Uncommon
Istvan's Ghoul
U
Creature – Zombie
When you control another creature, sacrifice that creature.
Source
Creatures have become stronger since especially in some colors. How about 3/2?
Is currently missing p/t. Also, the link is dead because they changed the custom card creation forum's url at MTG Salvation.
Some similar cards: Demonic Taskmaster, Skittering Horror, and Skittering Skirge.
If this ends up pacified you might have really screwed up yourself.
Maybe 3/1? That also helps little bit in getting rid of it.
I think the drawback is too rough. Why isn't it something like "at end step / upkeep, sacrifice another creature"?
added p/t; see original source