Aboshiv the Krakenspawn

Whenever you put the first +1/+1 counter on
Aboshiv the Krakenspawn this turn, create a
Treasure token. (It's a colorless artifact with:
"{t}, Sacrifice this artifact: Add one mana of any
color to your mana pool.")
Remove a +1/+1 counter from Aboshiv the
Krakenspawn: create a 1/1 blue Tentacle
creature token.
He stole himself from his Simic captors.