Munchkin

If someone successfully helps you, the monster is slain.
Discard it, draw treasure (see below), and follow any special
instructions on the monster card. You go up a level for each slain
monster. Your helper does not go up . . . unless he’s an Elf, in
which case he also gains one level for each monster slain. You
draw the Treasure cards, even if it was your helper’s special
ability that defeated the monster.