Surge.

When Revealed: Attach to Eroc, if able (if Eroc is not in play, discard Axe of the Firebeards). Counts as a Weapon attachment with the text: "After Eroc attacks and destroys an enemy, ready him. If Eroc is in his own play area, he makes an additional attack against the best eligible target."

Shadow: Resolve Axe of the Firebeards' "When Revealed" effect.