Tibia Mariner

Whenever a non-token creature you control dies,
choose one —
•{b}, Create a 1/1 black Skeleton creature token with
"{t}, Sacrifice this creature: regenerate target Skeleton you control."
•{g}, Create a 1/1 green Skeleton creature token with
"{t}, Sacrifice this creature: put a +1/+1 counter on target Skeleton you control."
•{u}, Create a 1/1 blue Skeleton creature token with
"{t}, Sacrifice this creature: draw a card."