Game ID: 934997750
Link to Video:
Setup: Tortured Existence and three Swamps on the battlefield, Thoughtpicker Witch and Sanitarium Skeleton in the graveyard, Grave Scrabbler in hand. Activate Tortured Existence, target Sanitarium Skeleton, paying {B} and discarding Grave Scrabbler. Madness on Grave Scrabbler triggers, choose to cast it, Grave Scrabbler resolves.
Expected Behavior: Grave Scrabbler's ETB ability triggers, allowing its controller to target Thoughtpicker Witch. Thoughtpicker Witch returns to hand alongside Sanitarium Skeleton.
Observed Behavior: Grave Scrabbler's ETB does not trigger. Only Sanitarium Skeleton returns to hand.
This is a key engine piece in a deck that I plan to feature on stream. I'm not going to be able to showcase this deck until this bug gets fixed.