Arcane Acupuncture

You use your knowledge of magical anatomy to insert a needle into a willing creature, up to 10 needles, giving the scaling effects below.

1. The target's gains +1 to Ac and attack rolls.
2. None.
3. The target can't receive the effects of any hp restoring spells.
4. The target is immune to being frightened, paralyzed, stunned, and charmed.
5. None.
6. The target's maximum hp is halved.
7. The target's receives an additional action on its turn.
8. None.
9. The target's hit points are reduced to 0 at the end of its next turn.
10. All attacks the target makes are automatic critical hits. 

The spell's target or any adjacent creatures friendly with the target, may use their action to remove needle(s), but the spell's target will take 1d10 damage for each needle removed. Anyone with the Arcane Acupuncture spell may remove them without causing damage. This spell ends an hour after the last needle is placed. Only one creature at a time can be effected by this spell. To switch between creatures, All needles must to be removed from the previous target or the spells duration elapses. 

When you cast this spell using a spell slot of 2nd level or higher, you can insert an additional needle for each slot level above 1st.