Skarrgan Firebird — ruling 1

You can activate Skarrgan Firebird's last ability if an opponent was dealt damage by any source, even if you didn't control that source.

Skarrgan Firebird : règles, fonctionnement et interactions (MTG)

Skarrgan Firebird 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

Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters with three +1/+1 counters on it.) Flying : Return this card from your graveyard to your hand. Activate only if an opponent was dealt damage this turn.

How it works : Skarrgan Firebird

Original English text — Wizards of the Coast / Scryfall

#1February 1, 2006· Wizards of the Coast
You can activate Skarrgan Firebird's last ability if an opponent was dealt damage by any source, even if you didn't control that source.
No other card is named in this ruling.