Kraken, Seaman's Bane

Horror (Kraken, Seaman's Bane can't be killed by Non-Black, Non-Artifact Non-Land creatures.)
Kraken, Seaman's Bane cost's {1} less for each blue creature or sorcery in your graveyard with converted mana cost 5 or greater.
Kraken, Seaman's Bane can't be counted.
Kraken, Seaman's Bane cant be blocked by creatures with power 3 or less.