Create abomination

In the casting of the spell the caster takes up to 4 humanoid corpses and stitches and reanimates them into an Abomination. The abomination is chaotic evil as it loathes its own existence, you can have up to 3 abominations at a time. If you try to make a 4th one the oldest one dissolves into a pile of goo. The caster has the start blocks and controls their actions.

When upcasted: for every extra 2 humanoid corpses used the abomination grows one size category (to a max of gargantuan), its slam attack increases by one die, and it's HP increases by 20.