Sigil of the New Dawn
Onslaught — rare
Enchantment
Sigil of the New Dawn rulings:
2018-12-07: Sigil of the New Dawn's ability triggers if a creature you own dies under another player's control.
2018-12-07: If a creature you own dies at the same time that Sigil of the New Dawn leaves the battlefield, Sigil of the New Dawn's ability triggers for that creature.