Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature’s color.)
The ultimate answer to intrigue and subtlety.
illus. Simon Dominic # 273/259
Quote from master_of_the_universe »Dies to four copies of Grasp of Darkness, literally unplayable
In all seriousness, this card seems pretty cool, although it's in dire need of trample. 10 mana for a 16/16 seems decently efficient though, especially with convoke and indestructible. Won't see much play in Standard, but it'll terrorize kitchen tables for years to come.