Benalish Marshal — ruling 1

Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to a creature you control may become lethal if Benalish Marshal leaves the battlefield during that turn.

Benalish Marshal : règles, fonctionnement et interactions (MTG)

Benalish Marshal 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

Other creatures you control get +1/+1.

How it works : Benalish Marshal

Original English text — Wizards of the Coast / Scryfall

#1April 27, 2018· Wizards of the Coast
Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to a creature you control may become lethal if Benalish Marshal leaves the battlefield during that turn.
No other card is named in this ruling.