Flamestick Courier — ruling 1

It checks the creature type when the ability is announced and resolved, but once the effect is placed on the creature, if its creature type changes the effect still continues.

Flamestick Courier : règles, fonctionnement et interactions (MTG)

Flamestick Courier 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

You may choose not to untap this creature during your untap step. , : Target Goblin creature gets +2/+2 and has haste for as long as this creature remains tapped.

How it works : Flamestick Courier

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
It checks the creature type when the ability is announced and resolved, but once the effect is placed on the creature, if its creature type changes the effect still continues.
No other card is named in this ruling.