The Skeleton alternates between 2 moves. On it's first alternation, it rolls a D4-1 to deal the result to the player it's field.
On it's second alternation, it applies one Protection status to a random enemy.
Protection
On slaying the skeleton, it spawns a bone pile in it's field. This pile is untargetable, and in two turns if the other enemies are not defeated, it revives the skeleton with 1 hp.
(Placeholder Art)