Dreaded waters

{t}{x}: add {u} to your mana pool.
Players may create tokens from their graveyards.
{t}{u}: Create a blue 1/1 tentacle creature
token.
When there are 8 or more blue 1/1
tentacle creature tokens in your graveyard
create a blue 8/8 Kraken creature token with
Trample and Indestructible