Silumgar, the Drifting Death — ruling 1

The creatures affected by Silumgar’s triggered ability are determined relative to the Dragon that attacked. For example, if Silumgar attacked one opponent and two other Dragons attacked another opponent, creatures controlled by the first opponent would get -1/-1 until end of turn and creatures controlled by the second opponent would get -2/-2 until end of turn.

Silumgar, the Drifting Death : règles, fonctionnement et interactions (MTG)

Silumgar, the Drifting Death 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

Flying, hexproof Whenever a Dragon you control attacks, creatures defending player controls get -1/-1 until end of turn.

How it works : Silumgar, the Drifting Death

Original English text — Wizards of the Coast / Scryfall

#1November 24, 2014· Wizards of the Coast
The creatures affected by Silumgar’s triggered ability are determined relative to the Dragon that attacked. For example, if Silumgar attacked one opponent and two other Dragons attacked another opponent, creatures controlled by the first opponent would get -1/-1 until end of turn and creatures controlled by the second opponent would get -2/-2 until end of turn.
No other card is named in this ruling.