Illusionist's Gambit

If there's a cost associated with having a creature attack, the player isn't forced to pay that cost, so it doesn't have to attack.

Creatures that didn't attack during the combat phase when Illusionist's Gambit resolved aren't required to attack in the additional combat phase, although they may. Those creatures can attack you or a planeswalker you control.

If, during a player's declare attackers step, a creature is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under that player's control continuously since the turn began (and doesn't have haste), then it doesn't attack.