Powerups

There are 3 Powerups within Castle Doombad. Doomsday Missles, which spawns several of missiles to destroy or do massive damage to all heroes on screen, Mega Scream, which resets all trap/minion cooldowns and makes the next one cost 0 Screams, and Princess Shield, which adds a heavy shield around the Princess, which has high defense and needs to be destroyed in order for the heroes to rescue her. You can buy 3 of a Powerup for 5 Evilness, 10 for 10 and 15 for 20, if I remember correctly.