Vivien's Crocodile — ruling 1

Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to Vivien’s Crocodile may become lethal if your Vivien planeswalker leaves the battlefield during that turn.

Vivien's Crocodile : règles, fonctionnement et interactions (MTG)

Vivien's Crocodile 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

This creature gets +1/+1 as long as you control a Vivien planeswalker.

How it works : Vivien's Crocodile

Original English text — Wizards of the Coast / Scryfall

#1July 12, 2019· Wizards of the Coast
Because damage remains marked on a creature until it’s removed as the turn ends, nonlethal damage dealt to Vivien’s Crocodile may become lethal if your Vivien planeswalker leaves the battlefield during that turn.
No other card is named in this ruling.