Furor of the Bitten

Enchantment — Aura

Enchant creature
Enchanted creature gets +2/+2 and attacks each combat if able.

2020-06-23:
If the enchanted creature can’t attack for any reason (such as being tapped or having come under that player’s control that turn), then it doesn’t attack. If there’s a cost associated with having it attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.