Primordial Ooze

Creature - Ooze 1/1, R (1)
Primordial Ooze attacks each turn if able.
At the beginning of your upkeep, put a +1/+1 counter on Primordial Ooze. Then you may pay {X}, where X is the number of +1/+1 counters on it. If you don't, tap Primordial Ooze and it deals X damage to you.¹
The thick, moving mass from the beginning of evolution swallows and digests the animate and inanimate as it unthinkingly strives to continue its existence.
Illus. Sandra Everingham

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: It becomes tapped even if the damage is prevented.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (3/9)	Fifth Edition (Uncommon) Chronicles (Uncommon) Legends (Uncommon)