Big Chill

Omnitrix Transformation. Big Chill is one of Ben Tennyson's Ten Locked Forms. Ben retains his Intelligence, Wisdom, Charisma, languages, proficiency bonus, and proficiencies while transformed unless this form states otherwise. Ben's proficiency bonus is +6 while in this form; ignore the CR-based proficiency bonus displayed by D&D Beyond.

Incorporeal Movement. While intangible, Big Chill can move through other creatures and objects as if they were difficult terrain. If he ends his turn inside an object, he takes 2d10 force damage and is pushed out to the nearest unoccupied space.

Freezing Passage. When Big Chill passes through a creature or object while intangible, he can freeze it. A creature passed through takes 4d8 cold damage and is chilled until the end of its next turn. If the creature is already affected by this ability, it instead becomes restrained in ice until it uses an action and succeeds on a Strength check against Ben's save DC.

Flight. Big Chill has a flying speed of 50 feet.

Freezing Breath. Big Chill exhales freezing air in a 30-foot cone. Each creature in that area must make a DC 17 Constitution saving throw. On a failed save, a creature takes 4d8 cold damage and its speed is halved until the end of its next turn. On a successful save, the creature takes half as much damage and its speed isn't reduced.

If a creature already affected by Freezing Breath fails this saving throw again, it becomes restrained in ice. A restrained creature can use its action to make a DC 17 Strength check, freeing itself on a success.

Intangibility. Big Chill becomes incorporeal until the start of his next turn. While incorporeal, he can move through creatures and objects as if they were difficult terrain and can use his Freezing Passage trait.