Madame Claus

+1: Bake a batch of Cookies, your create a +0/+1 counter that can be place on any other Elf creature.
-2: Down and dirty, tussle with the reindeer and create a -0/-1 counter that can be placed on target opponent creature, lose 1 life.
-7: Poison the batch, share your poisoned cookies with target opponent, they get a permanent Salmonella Emblem.