Bloodhall Ooze | Magic: The Gathering
Formats Bloodhall Ooze is Legal in
Official Oracle Text for Bloodhall Ooze
At the beginning of your upkeep, if you control a green permanent, you may put a +1/+1 counter on Bloodhall Ooze.
Official Rulings for Bloodhall Ooze
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).