Cards like Virgin Sacrifice and Betrayal should probably only be playable if your opponent has a creature in play. Right now you can sacrifice and get healing if there's nothing in play.
Taint seems to behave differently for me vs the computer. I give it 2 taint, and it took 2 points a round in damage. It gave me 3, I took 3 damage - and my taint went up to 6. The next round I took 6 and it went up to 9. The next I took 9 and it went up to 12. The next it killed me.
Something seriously broken in the game balance there. Spells are castable without purchasing them, and killing something half my level with a single spell gives me enough Xps to gain 3-4 levels.
Seems to have problems with not turning ball colors off when removed from play and occasionally seems to sneek a blue ball out when there's another color showing.
Gameplay has a serious flaw - whoever moves first is at a serious disadvantage because reenforcements are distributed at the end of the turn. You attack, opponent attacks your weakened forces, then the oppoenent gets reenforced before you can counter attack.
Needs a faster fast forwards.
Seemed to get confused after developing and deploying a vaccine and 'Vaccine did not work as expected'. Took 370 odds days to develop another one, but no pop up and no redeployment.