Faerie Bladecrafter — ruling 1

Normally, combat damage is dealt all at the same time. In that case, Faerie Bladecrafter's first triggered ability triggers once for each player that Faeries you control dealt combat damage to, regardless of how many creatures were dealing that damage. If any of those Faeries have double strike or first strike, the ability will trigger once for each player dealt damage in each combat damage step.

Faerie Bladecrafter — ruling 2

Use Faerie Bladecrafter's power from when it was last on the battlefield to determine the value of X.

Faerie Bladecrafter : règles, fonctionnement et interactions (MTG)

Faerie Bladecrafter 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

Flying Whenever one or more Faeries you control deal combat damage to a player, put a +1/+1 counter on this creature. When this creature dies, each opponent loses X life and you gain X life, where X is its power.

How it works : Faerie Bladecrafter

Original English text — Wizards of the Coast / Scryfall

#1September 1, 2023· Wizards of the Coast
Normally, combat damage is dealt all at the same time. In that case, Faerie Bladecrafter's first triggered ability triggers once for each player that Faeries you control dealt combat damage to, regardless of how many creatures were dealing that damage. If any of those Faeries have double strike or first strike, the ability will trigger once for each player dealt damage in each combat damage step.
No other card is named in this ruling.
#2September 1, 2023· Wizards of the Coast
Use Faerie Bladecrafter's power from when it was last on the battlefield to determine the value of X.
No other card is named in this ruling.