Aliana, Deep Sea Witch

Whenever you cast a non-creature spell,
create a 2/2 blue and black eel creature
token with deathtouch and islandwalk.
{2}{b},{t}, sacrifice a creature: Put a +1/+1 counter on all creatures with islandwalk you control. Then put a +1/+/1 counter on each creature with deathtouch you control.