Meat Kraken

As an additional cost to cast Meat Kraken, exile
one or more cards from your battlefield and/or
graveyard with total power or total toughness
equal to or greater than Meat Kraken's converted
mana cost. Meat Kraken costs {x} less to cast,
where X is the exiled cards' converted mana cost.
Whenever a creature dealt damage by Meat
Kraken this turn dies, put a +1/+1 counter on it.