Illness in the Ranks — ruling 1

If an effect creates a creature token that normally has toughness 1, it will enter with toughness 0, be put into its owner's graveyard as a state-based action, and then cease to exist. Any abilities that trigger when a creature enters or dies will trigger.

Illness in the Ranks : règles, fonctionnement et interactions (MTG)

Illness in the Ranks 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

Creature tokens get -1/-1.

How it works : Illness in the Ranks

Original English text — Wizards of the Coast / Scryfall

#1January 24, 2013· Wizards of the Coast
If an effect creates a creature token that normally has toughness 1, it will enter with toughness 0, be put into its owner's graveyard as a state-based action, and then cease to exist. Any abilities that trigger when a creature enters or dies will trigger.
No other card is named in this ruling.