The Gravemind

Trample
Upon entering the battlefield destroy target creature. The Gravemind gains all abilities and keywords of the destroyed creature. Then mill 5
During each of your turns, you may play a non-artifact creature spell from your graveyard
{3}{t}Destroy target creature. Create a 1/1 Flood Infect Form Zombie token with deathtouch and if this creature kills a non-artifact creature with toughness 2 or less create a 3/3 Flood Combat Form Zombie token creature.
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