Saphirius Expectorium Perpetua is a spell that allows the caster to create a sustained whirlwind in the air in order to propel the caster into the air or be used as a makeshift shield.
In Divided We Stand, Gwen used this spell to protect kids from a collapsing house. Then she used this spell to save Ben after he fell from Dr. Animo's mutant bird. Later to protect herself and Max from Mutant Squid. Finally, Gwen used this spell to win a race against Ben and Max.