Once per turn: You can banish 1 "Ritual Beast" card from your Deck, face-up. During your second Standby Phase after this effect's activation, add the card banished by this effect to your hand. You can only Special Summon "Spiritual Beast Cannahawk(s)" once per turn.
You can exploit Cannahawk’s once per turn effect by using him as fusion material for a Ritual Beast extra deck monster. And then returning that monster to the extra deck to revive Cannahawk along with the monster you banished with Cannahawk’s effect. Banished Ritual Beast monsters are fairly easy to recover without waiting the two Standby Phases.