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Big Chill is the Omnitrix's DNA sample of a Necrofriggian from the planet Kylmyys.


Big Chill is a humanoid, moth-like alien whose four wings and antenna can fold up into a hooded robe (much akin to a poncho), giving him the appearance of a phantom. He has a black body with cyan patches on his arms, shoulders, legs, the back of his wings, and the back of his neck that resemble ice chunks. Each patch has thick blue outlining except for the ones on his wings, which are outlined in black. There is also a black line that runs on the edge of the outer margin on the back of each wing.

On his torso are three plates: one resembling the chest, a shorter plate under the chest, and one resembling the stomach. On his face are blue cheeks and underjaw, a mouth that always shows bluish-white teeth, and large green eyes with dark green spots. The top of his head also sports a blue Y-shaped marking that extends over his scalp. He has three pointed fingers and a thumb on each hand, and two toes on each foot and a third toe-like extension on his ankles.

Big Chill wears the original Omnitrix symbol on his chest.

Powers and Abilities

Big Chill is capable of breathing a wind or beam that reduces the temperature surrounding it, turns to ice constructs mid-air or upon touching a target, or encasing a target completely in ice. His breath can be as strong as wind.

Big Chill can freeze strong adhesives using his ice breath and make them brittle.

Big Chill can fly using his wings, as well as levitate.

Big Chill can become intangible.

Big Chill has enhanced strength, as he was able to carry a Human while keeping steady flight.[1]

Big Chill is rather durable. Despite this, Big Chill prefers to use his intangibility to avoid being hurt.

Big Chill is quite agile, as he is capable of dodging attacks while flying.

Big Chill is immune to extreme temperatures, both hot and cold, as he was completely unfazed being touched by a Pyronite.[1]


There is a limit to Big Chill's durability, as a punch from a Celestialsapien was able to knock him out of the sky.[1]

Big Chill is vulnerable to the telekinetic abilities of a Celestialsapien.[1]


Ben 10


Ben 10

Season 5

Video Games

Cartoon Network Arcade

Big Chill is a common collectable figure in the Cartoon Network Arcade app.


  • Big Chill's inclusion in the reboot was first teased in a promo for Season 5, when his hologram appears on Alien Force Ben's Omnitrix.[CN 1]
  • Big Chill's design in the reboot looks mostly similar to his Classic counterpart's appearance in Alien Force and Ultimate Alien except his face is rounder and his wings appear smaller.
  • Big Chill is the last Alien Force alien to be introduced in the Reboot.
  • Big Chill is one of the five regular aliens featured in the reboot to have a green Omnitrix symbol, the others being Alien X, Chromastone, Ampfibian, and Bloxx.
  • Big Chill is one of Dee Bradley Baker's favorite aliens to voice, the other being Spidermonkey.[DBB 1]


Cartoon Network

Dee Bradley Baker

Introduced in Season 1 CannonboltDiamondheadFour ArmsGaxGrey MatterHeatblastOverflowStinkflyUpgradeWildvineXLR8
Introduced in Season 2 RathShock Rock
Introduced in Season 3 HumungousaurSlapback
Introduced in Season 4 GoopJetrayWay Big
Introduced in Season 5 Alien XBig ChillBloxxBuzzshockChromastoneRipjawsSpidermonkeySurge
Omni-Enhanced Aliens CannonboltDiamondheadFour ArmsGrey MatterHeatblastOverflowStinkflyWildvineXLR8
Omni-Kix Aliens CannonboltDiamondheadFour ArmsHeatblastHumungousaurJetrayRathShock RockSlapbackXLR8
Omni-Naut Aliens HeatblastJetrayHumungousaurShock Rock
Fusion Aliens Amalgam AlienAmalgam BenGrey ArmsXLRArmBlastDiamondHeat
Non-Canon Aliens Banana AlienBlack Hat AlienHotdawgMole-StacheScooter Alien
Non-Canon Fusion Aliens Omnitrix Glitch FusionDiamondhead-Humungousaur FusionRath ArmsShock Blast