
Haste
Boast — {1}: You may have Arni's base power become 1 plus the greatest power among other creatures you control until end of turn. (Activate only if this creature attacked this turn and only once each turn.)
Arni Brokenbrow has 5 printings, first in Kaldheim (2021). EDHREC ranks it #16,950 among Commander cards. It appears most in Zilortha, Strength Incarnate decks (634 on EDHREC). It has 8 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.