Jubilant Skybonder — ruling 1

Jubilant Skybonder’s last ability applies to itself as long as it still has flying.

Jubilant Skybonder — ruling 2

An opponent’s spell that targets a single creature with flying you control more than once costs only {2} more to cast. An opponent’s spell that targets multiple creatures with flying you control costs {2} more for each of those creatures.

Jubilant Skybonder : règles, fonctionnement et interactions (MTG)

Jubilant Skybonder 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 Creatures you control with flying have "Spells your opponents cast that target this creature cost more to cast."

How it works : Jubilant Skybonder

Original English text — Wizards of the Coast / Scryfall

#1April 17, 2020· Wizards of the Coast
Jubilant Skybonder’s last ability applies to itself as long as it still has flying.
No other card is named in this ruling.
#2April 17, 2020· Wizards of the Coast
An opponent’s spell that targets a single creature with flying you control more than once costs only more to cast. An opponent’s spell that targets multiple creatures with flying you control costs more for each of those creatures.
No other card is named in this ruling.