This enhanced Ice Tower has a larger freeze area and freezes bloons for longer.
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~ BTD5 Flash description
Enhanced Freeze is the first upgrade on path 1 for the Ice Tower in BTD5. It increases tower's range and the time bloons are frozen for from 1.43 seconds to 2 seconds. It costs: $190 (Easy), $230 (Medium), $245 (Hard), and $270 on (Impoppable). In BTD5, it changes the tower's appearance so that the 'stone' it stands on is now blue.