Guilds of Ravnica :: Siege Wurm

Eratta

Creature — Wurm
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Other Releases

Ravnica: City of ...
Magic 2015