Give your opponents a sub-zero surprise and put their intentions on ice.
— Description, Sonic Forces: Speed Battle
The Ice Mine is a Trap Item that appears in Sonic Forces: Speed Battle. When used, it will place three ice-based chunks that can block the opponents' way.
The Ice Mines take the form of spiked balls made entirely of light blue ice.
In gameplay, the Ice Mine can only be obtained at random from Item Boxes by Amy, Chaos, and Sonic. As with all other Items, Metal Sonic can also use the Ice Mine if he uses the Steal Item to steal it from the aforementioned users.
When used, three ice blocks will be dropped some distance ahead of the user's current location on all the lanes that the user is not currently on. Touching an Ice Mine with a playable character (including the user) will cause them to freeze instantly. This effect will last for a short amount of time or until the player gets hit by an obstacle or falls into a bottomless pit. The Ice Mines can be upgraded for each individual user by levelling them to levels 4, 10 and 16, increasing the duration a hit character stays frozen.
To avoid Ice Mines, the player must either jump over them, or run in-between them.