Nimbus Champion 
Creature — Avatar Warrior
Flying Whenever this creature attacks, you may return target creature to its owner's hand if that creature's power is less than or equal to the number of Warriors your team controls.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL