Stone of Erech
Legendary Artifact
If a creature an opponent controls would die, exile it instead.
, 
, Sacrifice Stone of Erech: Exile target player's graveyard. Draw a card.
"At the Stone of Erech they shall stand again and hear there a horn in the hills ringing." —Malbeth the Seer
Jonas De Ro
Rulings
Because creatures controlled by opponents aren't being put into a graveyard, any "when [this creature] dies" triggered abilities those creatures have won't trigger.
(wotc • 2023-06-16)
If the target is not legal as Stone of Erech's activated ability tries to resolve, the ability is removed from the stack. You won't draw a card.
(wotc • 2023-06-16)
Rulings
Because creatures controlled by opponents aren't being put into a graveyard, any "when [this creature] dies" triggered abilities those creatures have won't trigger.
(wotc • 2023-06-16)
If the target is not legal as Stone of Erech's activated ability tries to resolve, the ability is removed from the stack. You won't draw a card.
(wotc • 2023-06-16)