Kangee, Sky Warden — ruling 1

Only attacking creatures that have flying as the first triggered ability resolves will get the +2/+0. Similarly, only blocking creatures that have flying as second triggered ability resolves will get +0/+2. Giving a creature flying or making it lose flying after that point won't change the bonus the creature has, if any.

Kangee, Sky Warden : règles, fonctionnement et interactions (MTG)

Kangee, Sky Warden 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, vigilance Whenever Kangee attacks, attacking creatures with flying get +2/+0 until end of turn. Whenever Kangee blocks, blocking creatures with flying get +0/+2 until end of turn.

How it works : Kangee, Sky Warden

Original English text — Wizards of the Coast / Scryfall

#1November 10, 2020· Wizards of the Coast
Only attacking creatures that have flying as the first triggered ability resolves will get the +2/+0. Similarly, only blocking creatures that have flying as second triggered ability resolves will get +0/+2. Giving a creature flying or making it lose flying after that point won't change the bonus the creature has, if any.
No other card is named in this ruling.