I notice there isn't a way for players to gain multiple attacks. So I think "
If a combatant gets attacked by more than one creature before their turn they, the defender, can’t deal damage unless they have multiple attacks" should be changed to "can't be an attacker" so they can still deal damage if their defense roll is higher then the attackers.
Under the Baslisk : "They turn back then the basilisk is dead. " then should be when.