Tower of Unfound Depths

Whenever this card enters the battlefield put 8
depth counters on it, whenever you cast a blue
creature spell remove a depth counter from
this card
At the beginning of your upkeep if you have no
depth counters on this card, sacrifice this card
and create a token 4/4 blue Kraken that has
Flying and "At the beginning of an upkeep copy
this creature"
"Be prepared boys, there's never only one" - previous
lighthouse manager