The friendly melee AI in this game is terrible. It won't attack an enemy ranged unit until another friendly AI gets killed by said ranged enemy. Then it'll abandon the attack if another enemy unit gets killed, even if it wasn't the ranged unit killing the friendly units.
Small bug I found-- if you run out of stamina and the fish thing presses the button while the zone is transitioning, the zone looks the same. If this happens during the transition from level 1 to level 2, level 2 still has the jetpack and flying enemies, but displays the road from level 1 instead of the acid.
@jooe15 Really, the only reason anyone should play Serka is with a mostly-full undead deck, because of his Lord ability. It's the same with Talenor, Hrafn, Ironhide, etc. They're not supposed to be used in a mixed deck.