Altrazian Kraken

Captain - This card must be your commander. Before the game starts, chose a color. This card's color identity is also that of the chosen color.

Eminence - All your Island also produces mana of the chosen color. During your opponent's turns, Krakens you control are not creatures. Non-token, non-creature Krakens you control have "{t}: Create a 1/10 Blue Tentacle creature token. Sacrifice it at the next end step."

{u}{u}{u}{u}{u}, {t}: Create a 10/10 Blue Kraken creature token with Haste