Colossal Heroics

In Commander, Colossal Heroics earns its slot in any deck that attacks with more than two creatures — the untap converts a tapped-out board into surprise blockers, and the counters accumulate across the game. Competitive formats tell a different story: in Modern and Pioneer, two mana at instant speed competing against Heroic triggers or combat tricks needs to generate tempo immediately, and a +1/+1 counter spread thin across multiple creatures rarely closes games the way a pump on a single threat does. Legacy has enough redundancy and speed that this effect is too fair to see serious play. Oathbreaker is its best non-Commander home, where planeswalker-adjacent go-wide builds can abuse the untap without the singleton constraint softening the payoff.