Storrev, Devkarin Lich
Legendary Creature — Zombie Elf Wizard
Trample
Whenever Storrev deals combat damage to a player or planeswalker, return to your hand target creature or planeswalker card in your graveyard that wasn't put there this combat.
In times of war, only death flourishes.
Igor Kieryluk
War of the Spark Promos (PWAR)
• #219pRulings
Storrev's triggered ability can't target any card that was put into your graveyard during this combat phase. This includes creatures and planeswalkers that died from combat damage, creatures and planeswalkers that died for any other reason, and cards that were put there from any other zone.
(wotc • 2019-05-03)
If Storrev dies due to combat damage dealt at the same time that it deals combat damage to a player or planeswalker, its ability still triggers.
(wotc • 2019-05-03)
Rulings
Storrev's triggered ability can't target any card that was put into your graveyard during this combat phase. This includes creatures and planeswalkers that died from combat damage, creatures and planeswalkers that died for any other reason, and cards that were put there from any other zone.
(wotc • 2019-05-03)
If Storrev dies due to combat damage dealt at the same time that it deals combat damage to a player or planeswalker, its ability still triggers.
(wotc • 2019-05-03)