Bloodhall Ooze

Creature — Ooze    (CMC:1)

At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on Bloodhall Ooze. At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on Bloodhall Ooze.

A drop of blood spilled from the first dragon.

59 CON • ENJaime Jones

™ & © 1993—2009 Wizards of the Coast

Legal in: Modern,Shards of Alara Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Classic,Singleton 100,Commander

Oracle Text (click to copy):

Bloodhall Ooze {R} Creature — Ooze At the beginning of your upkeep, if you control a black permanent, you may put a +1/+1 counter on Bloodhall Ooze. At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on Bloodhall Ooze. 1/1

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View this MTG card on Gatherer

2/1/2009
The "intervening 'if' clause" means that (1) the ability won't trigger at all unless you control a permanent of the specified color, and (2) the ability will do nothing unless you control a permanent of the specified color at the time it resolves.
2/1/2009
A permanent that's both black and green will allow both abilities to trigger (as will separate black permanents and green permanents, of course).

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