Does this card contain a typo? It isn't clear if you are supposed to attach this card to the abomination or not. We went ahead and attached it, assuming it was a typo.
Revelation - If there are no Abomination enemies in play, Altered Beast gains surge. Otherwise, choose an Abomination enemy. Heal all damage from that enemy and attached Altered Beast to it.
Forced - When you enter attached enemy's location (or vice-versa): Take 1 horror.