Cannibrae Parasite

When you cast Cannibrae Parasite, sacrifice a Human. Cannibrae Parasite enters the battlefield with X +1/+1 counters, where X is twice the converted mana cost of the sacrificed Human.
Consume 6 (If this creature deals lethal combat damage to a creature with power 6 or less, put a
+1/+1 counter on this card.)