Guardian of Dyphrex

Annihilator 2
When Guardian of Dyphrex is cast, you may pay {p/b}{p/b}{p/b}. If you do, search your library for an Eldrazi card, reveal it, and put it into your
hand. If you do not pay {p/b}{p/b}{p/b}, when Guardian of Dyphrex is cast, destroy target permanent and take 3 damage.