Wuxi Finger

Attempting this spell first requires you must have grapple a finger of the creature, which the creature makes a strength saving throw.

If you succeeded on the throw then by having the hold in place throw down your pinky finger and shout "Skadoosh"  if you choose not to this spell backfires (You get hit with the spell effect instead).

This launches the creature 5D12 feet (round up to the nearest 5) into the nearest wall/building (if their isn't one in the range then the creature just flies that far) and takes 1D6 per 10 feet (fall damage), if the creature takes more than 12 damage from fall damage then it's stunned for 1D6 turns.

If a creature is stunned by this then their AC increases by 1D6 for 2 rounds and then the DM rolls 2D10 and if the outcomes equal 9 or 11 any damage the creature takes is halved and if it equals 10 hen the creature is immune to all types of damage (except slashing, piecing and bulging (also this latest for 2D6+1D4 turns))

If you hit the same creature (Once per long rest) you can do a extra 1D10 (this increases 1D10 per your level above 1st (for example level 5 deals 5D10)). 

You can only use this twice per long rest.