Kill the horde of Skull warriors and collect the ectoplasm to set up towers and defenses whenever the magic stones light up: CATAPULTS, to throw flame to the enemy; BARRICADES, to
block the attackers in their path; BARRELS, to
shoot fire arrows and explode them in the middle of a skeleton legion; POISON PLANTS, to hit the warriors and slay them slowly while they walk... There are diverse types of magic
energy to use at war: LIGHTNING, to defeat targets with metal or steel armor; FIRE, to burn light armor troops and blow up the exploding barrels; ICE, to turn your victims into ice cubes and slow them down; POISON, just one drop and the victim will succumb little by little to its toxic effects; STUN, to
shoot and make their heads spin and leave them stupefied; EXPLOSIVE, to send everything flying with its strong TNT head... Use all with the different kind of arrows and do individual, radius or multiple damage.