Mystic Zealot — ruling 1

Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to Mystic Zealot may become lethal if the number of cards in your graveyard falls below seven.

Mystic Zealot : règles, fonctionnement et interactions (MTG)

Mystic Zealot 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

Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has flying.

How it works : Mystic Zealot

Original English text — Wizards of the Coast / Scryfall

#1December 8, 2022· Wizards of the Coast
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to Mystic Zealot may become lethal if the number of cards in your graveyard falls below seven.
No other card is named in this ruling.