When the moon rises and the bloodlust takes hold, nothing matters but the kill.

Curse of the Nightly Hunt

Enchant player
Creatures enchanted player controls attack each combat if able.

The List

Commander Anthology Volume II

Commander 2015

Enchant player
Creatures enchanted player controls attack each turn if able.

Innistrad

If, during the enchanted player’s declare attackers step, a creature they control 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. If there’s a cost associated with having the creature attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.

The enchanted player still chooses which player or planeswalker each creature they control attacks.