There appears to be a bug with Zealous Crusader, which alters the attack, but not the health bonus, gained from attacking the orb. I ended up with 1 crusader at 2/8, and another at 4/8. I don’t have a screenshot unfortunately, and will make sure to grab one next time, but the circumstances included:
Amai Merchant used by opponent
Blightborn Spectre on board for opponent.