Whenever you soulshift, you may draw a card.

: Target creature with converted mana cost 5 or greater gains soulshift X until end of turn, where X is one less than its converted mana cost.
The few mortals who dare hunt mythical prey slide into gibbering madness.
Created for Challenge # 097, from Spearbreaker Behemoth, Gibbering Kami and Sylvan Echoes. The Gibbering Kami only really lends the word "soulshift" (twice) (well, and the idea of soulshifting to N-1 like every other soulshifting Spirit). But the other two cards are quite strongly in here, I think, and this certainly wouldn't have gone here without the Kami's soulshift influence.
Feels fairly obvious, but nonetheless interesting. And mashups are all about finding interesting ideas.