Death's-Head Buzzard — ruling 1

The last ability of Death's-Head Buzzard affects only creatures on the battlefield at the time it resolves. Creatures that enter the battlefield later in the turn won't get -1/-1.

Death's-Head Buzzard : règles, fonctionnement et interactions (MTG)

Death's-Head Buzzard 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 When this creature dies, all creatures get -1/-1 until end of turn.

How it works : Death's-Head Buzzard

Original English text — Wizards of the Coast / Scryfall

#1March 16, 2018· Wizards of the Coast
The last ability of Death's-Head Buzzard affects only creatures on the battlefield at the time it resolves. Creatures that enter the battlefield later in the turn won't get -1/-1.
No other card is named in this ruling.