Dear apprentice, here we have 2 ways of fundamental card combo for you! Do not underestimate these combos , they will show great power if used at the right time!
1. Zombie Tomb+Frost Nova
MP Cost: 7 (3+4)
Card order: Summon skeleton defenders under enemy's turret, then froze units around.
Effect: The skeleton defenders can deal great damage to the turret without being attacked by units.
2. Wolf Summon+Rage
MP Cost: 7 (4+3)
Card order: Summon one Wolf Cavalry and spell Rage on him.
Effect: The Wolf Cavalry will put forward in a high speed and launch higher damage to turret.