Kaalia, Conflicted Warrior

Whenever an angel creature enters the battlefield, search your library for a demon or dragon card
and put it into your hand, then shuffle your
library. Whenever a demon creature enters the battlefield, search your library for an angel or
dragon card and put it into your hand, then
shuffle your library. Whenever a dragon creature enters the battlefield, search your library for
an angel or demon card and put it into your
hand, then shuffle your library.