Exhaling Portal

Complex

Magical

Trap

Stealth

DC 33

Disable

DC 30 Thievery (expert) twice to scratch out the runes, or dispel magic (5th level; counteract DC 30) to counteract the planar runes; DC 32 Athletics to shut the door if it's open (using Athletics only stops the trap, it doesn't fully disable it)

Gust [Reaction] (air)

Critical Success The creature is unaffected.

Success The creature is pushed back 5 feet.

Failure The creature is pushed back 10 feet.

Critical Failure The creature is pushed back 10 feet and knocked prone.