Scarlet Witch Protection Spell (Solo)

With allies like Iron Fist, healing from the likes of Med Team and Momentum Shift and Scarlet's Witch's own spells like Magic Shield, you can stay for a long time in hero form without taking any real damage.

Playing expensive cards like Heimdall with Chaos Magic is very satisfying. Build up the board with enough allies, supports and upgrades, then close the game out with Molecular Decay.