White Tempest
"Despite all of its natural predators having died out hundreds of years ago, the White Tempest still only travels during blizzards when it can disguise itself as a floating snowflake."
The White Tempest is a Tier 3 butterfly species found naturally in Tundra. It is the snow counterpart to the Drizzled Butterfly, having the matching effect but for snow. It prefers 
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Melanargia tempestas
White Tempest
Lifecycle
Butterfly Effect
When used in a Butterfly Hotel, as well as the standard Cross-Mutation of it's favourite flowers, this butterfly increases the duration of snow while active.
Hints
Sto's Journal give the following hint: "This nocturnal species appears during snowstorms, finding cover in it's favourite pink-coloured flowers.".
HOHO! SPOILERS AHEAD MATEY!!
Show spawning condition
It has a 22% of spawning.