Kreok Assassin of Keranos

+4: deal 3 damage to target player and 3 damage to each creature he/she controls
-3: put a 2/1 lightning elf with {t} deal 3 damage to target creature or player
-20: deal 3,5 damage to creatures,opponents that you don't control, if any opponents have less than 9 life each opponent receives 3 damage