Thrymokus, Rift Crafter

Colorless spells you control cost {1} less to cast.
Indestructible
Whenever Thrymokus, Rift Crafter attacks,
search your library for a Eldrazi creature card,
reveal it, and put it onto the battlefield.
Whenever Thrymokus, Rift Crafter dies, return
all Eldrazi creatures from your graveyard to the battlefield.