Illaoi, Kraken Priestess

Trample
When Illaoi, Kraken Priestess attacks, create a 1/1 tentacle token creature.
If a tentacle is already in play, instead put a +1/+1 token on it.
Illaoi's power is increased by the power of the strongest allied tentacle token creatures in play.
If Illaoi, Kraken Priestess is on the board when 15 damage is dealt by her and allied tentacle token creature, transform Illaoi, Kraken Priestess.