Goblin ICBM

: Choose target artifact a player controls and target artifact card in that player's graveyard. If both targets are still legal as this ability resolves, that player simultaneously sacrifices the artifact and returns the artifact card to the battlefield.

Whenever a creature enters, that creature's controller may have it deal damage equal to its power to any target of their choice.

Trample When this creature enters, sacrifice it unless you sacrifice any number of creatures with total power 12 or greater.