
Whenever this creature attacks, if it doesn't have first strike, put a first strike counter on it.
Whenever this creature attacks, if it has first strike, it gains double strike until end of turn.
Momentum Rumbler has 1 printing, first in Ikoria: Lair of Behemoths (2020). EDHREC ranks it #22,573 among Commander cards. It appears most in Stegron the Dinosaur Man decks (2 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.