Edited my post so that Even is now going to basic attack it. Also, I think the reason why we thought we weren't supposed to attack it is because the end of the IC was "It is about to kill them but without anything to fight, it's useless but until they heard the voice of their Personas(It's up to you what will they say) and they successfully summoned them."

It ended on us summoning our Persona, not attacking the Minotaur