Karn Perfected

: Pay 5 life: You may activate the loyalty abilities of Karn Perfected an additional time this turn. Activate only as a sorcery.
+1: Put a -1/-1 counter on target creature. Scry 1.
-5: Destroy all creatures with a -1/-1 on it. Draw a card for each creature with two or more -1/-1 counters destroyed this way.