She was born unable to walk. Through the eludha, she was able to fly.

Jubilant Skybonder

Flying
Creatures you control with flying have "Spells your opponents cast that target this creature cost {2} more to cast."

Starter Commander Decks

She was born unable to walk. Through the *eludha*, she was able to fly.

Ikoria: Lair of Behemoths

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