Legality

Alchemy

Brawl

Commander

Duel

Gladiator

Historic

Legacy

Modern

Oathbreaker

Pauper

Pauper Commander

Penny

Pioneer

Standard

Timeless

Rulings
Dec 8, 2022

If Juggernaut can't attack for any reason (such as being tapped or having come under your control that turn), then it doesn't attack. If there's a cost associated with having it attack, you're not forced to pay that cost, so it doesn't have to attack in that case either.