Dragonloft Idol — ruling 1

Because damage remains marked on a creature until it's removed as the turn ends, damage dealt to Dragonloft Idol may become lethal if you no longer control a Dragon later in the turn.

Dragonloft Idol : règles, fonctionnement et interactions (MTG)

Dragonloft Idol 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

As long as you control a Dragon, this creature gets +1/+1 and has flying and trample.

How it works : Dragonloft Idol

Original English text — Wizards of the Coast / Scryfall

#1November 17, 2017· Wizards of the Coast
Because damage remains marked on a creature until it's removed as the turn ends, damage dealt to Dragonloft Idol may become lethal if you no longer control a Dragon later in the turn.
No other card is named in this ruling.