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| Ice Castle|
- This stage was implemented in ver11.8.
- This stage is the first to contain a Boss that is 9x the size of normal enemies.
- This is the first stage which has more than one kind of boss, the second one being Mountaintop.
- This stage has the second highest number of unique bosses in the game, the first being Mountaintop.
- This stage is the second stage to contain a Boss susceptible to freeze without a loss of duration (the smaller and more numerous Orange Boss Castle Snake), with the first being the Pink Boss Gel Spider.
- This is the first stage to contain a boss with more LP than the Submarine Shrine Boss.
- This stage contains the highest number of bosses in a screen at once (100, being 99 Orange Boss Castle Snakes and the solitary White Boss Castle Snake.)
- This stage also contains the most numerically represented boss in the game, with 99 Orange Boss Castle Snakes.
- Snowfield, the stage type.