All creatures with flying able to block Talruum Piper do so.
Flying Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's...
First strike Whenever Talruum Champion blocks or becomes blocked by a creature, that creature loses first strike...
Flying Cloud Elemental can block only creatures with flying.
Whenever Raging Gorilla blocks or becomes blocked, it gets +2/-2 until end of turn.