Abomination of the Deep

Islandwalk, Devour 1
If an opponent has 15 or more cards in his graveyard, his lands are island in addition
to other tipes.
If an opponent has 30 or more cards in his graveyard, Abomination of the Deep is indestructible and gains +5/+5.
It devours everything, and everything it eats makes it stronger.