Unstoppable slasher went to the grave and didn't return to the field. It was killed on the battlefield but it didn't return to the field with stun counters or anything. It was killed with 2 artifact cards that deal 2 damage to any target and can be sacrificed for a 3/3 not sure exactly the name. It should've return to the battlefield with 2 stun counters but unfortunately it didn't on the arena app. As it reads should've happened but nothing triggered other than dying.