When you cast this spell, you may search your library for a colorless creature card with converted mana cost 7 or greater, reveal it, then shuffle your library and put that card on top of it.
The first creature spell you cast each turn costs less to cast.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Target creature gets +1/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)