High Warlord Naj'entus

Immune (Can't be attacked, damaged, or targeted.) At the end of your turn, put a spine counter on target opposing hero, and Naj'entus deals 2 melee damage to it. 2, Exhaust a hero or ally in your party with no spine counters => Remove all spine counters from all characters and flip Naj'entus. Only an opponent can use this power, and only on his turn. When Naj'entus flips to this side, he deals 2 frost damage to each opposing hero. Naj'entus has +2 ATK while attacking.