Animate Dark Colossal Skeleton

This spell creates ether a Dark Colossal Skeleton. Choose 2 Dark Skeleton Giants under your control and with your nercomatic might you fuse them together Creating your Colossal Undead minion.(DM will have stat sheet) These dark colossal skeletons remain in this new form for 3 hour or in till health is brought to 0. After 3 hour they will revert back into stander skeletons. If health is brought to zero the 18 skeletons are destroyed and can't be reanimated. This Dark Colossal Skeleton weapons are emboldened with necrotic energy adding 2d12 necrotic damage and healing the caster for half the damage dealt 

On each of your turns, you can use a bonus action to mentally command any creature you made with this spell if the creature is within 60 feet of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor. If you issue no commands, the creature only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.