Snapsail Glider — ruling 1

For the purposes of combat, whether Snapsail Glider has flying is relevant only as the declare blockers step begins. If an attacking Snapsail Glider without flying becomes blocked, gaining control of enough artifacts to cause it to have flying won't change that. Similarly, if a Snapsail Glider with flying blocks another creature with flying, losing control of enough artifacts to cause the Glider to lose flying won't change that.

Snapsail Glider : règles, fonctionnement et interactions (MTG)

Snapsail Glider 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

Metalcraft — This creature has flying as long as you control three or more artifacts.

How it works : Snapsail Glider

Original English text — Wizards of the Coast / Scryfall

#1January 1, 2011· Wizards of the Coast
For the purposes of combat, whether Snapsail Glider has flying is relevant only as the declare blockers step begins. If an attacking Snapsail Glider without flying becomes blocked, gaining control of enough artifacts to cause it to have flying won't change that. Similarly, if a Snapsail Glider with flying blocks another creature with flying, losing control of enough artifacts to cause the Glider to lose flying won't change that.
No other card is named in this ruling.