Storrev, Devkarin Lich — ruling 1

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.

Storrev, Devkarin Lich — ruling 2

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.

Storrev, Devkarin Lich : règles, fonctionnement et interactions (MTG)

Storrev, Devkarin Lich is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

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.

How it works : Storrev, Devkarin Lich

Original English text — Wizards of the Coast / Scryfall

#1May 3, 2019· Wizards of the Coast
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.
No other card is named in this ruling.
#2May 3, 2019· Wizards of the Coast
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.
No other card is named in this ruling.