Santa Clause

+5: lob 3 pieces of coal at three target creatures. each piece of coal deals 1 damage.
-5: create a 3/3 elf token with trample, and whenever this creature deals damage to a player or planeswalker it gets +x/+x where x is its power.
-10: you are put on the nice list, your opponents are put on the naughty list. all nice list creatures get +1/+1 all naughty creatures gets -1/-1