There are lots of cool reward cards on the game and my favorite reward card is Goblin Mech. Goblin Mech is a neutral reward card which is the most powerful melee monsters. At max level this card has 6 melee attack and if you use Daria Dragonscale, Pixie, Silvershield Knight and Angel Of Light together then this card will have 10 melee attacks which is insane.
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