Collector's Cage

收集者秘笼 (Collector's Cage) (zhs)

Artifact (CMC 2)
Hideaway 5 (When this artifact enters the battlefield, look at the top five cards of your library, exile one face down, then put the rest on the bottom in a random order.)
, : Put a +1/+1 counter on target creature you control. Then if you control three or more creatures with different powers, you may play the exiled card without paying its mana cost.