Happy Birthdays Wiki
No.004 Asteroxylon
Rarity  Rarity1.pngRarity1.pngRarity1.png
Vitality C Fertility A
Evolution D Adaptation S
Trophic LV C Size B
A Baragwanathia that underwent a mutation and migrated to plains where water is scarce. Due to its mutation, it hates moisture and cannot emerge near sea.
Height icon.png Height Land
Temp land icon.png Birth Temp. 38°C ~ 48°C
Temp land icon.png Adaptation Temp. 28°C ~ 63°C
Moisture icon.png Birth Moisture 1% ~ 5%

Asteroxylon is an organism in Happy Birthdays.

Birth Requirements[]

For Asteroxylon to appear in the cube, Baragwanathia needs to be around along with some area with little moisture along with a high cube temperature. Its birth temp range is very similar to Bargwanathia, so if the player has it already, Asteroxylon is close behind. After a bit of time with these conditions or by using a Seed of Mutation on Baragwanathia, Asteroxylon should appear.

During the story mode, it becomes available during the first episode: The Cube is born.

Evolution Relations[]

No.003 Baragwanathia
Mutated From



No.003 Baragwanathia Organisms No.005 Cyclomedusa