Cauldon, Flame Reborn

+1: You may sacrifice a creature. If you do, draw a card and put a number of loyalty counters on Cauldon equal to that creature's power.
0: Cauldon, Flame Reborn deals damage to target creature or player equal to the number of loyalty counters on him minus 5.
-X: Destroy target creature with power X or less. If X is 7 or more, instead destroy all creatures with power X or less.