Winterheart

"'A mighty frozen upgrader that treats ores at every level with love. 2016 Holiday Exotic.'"

Overview
The Winterheart is a Winter Exotic way-up-high upgrader with the appearance of a snowy tree. It comes with the following effects:
 * Ore with negative ore value are automatically bumped up to $1B.
 * Ore worth more than $0 but less than $500 have their ore value squared (multiplied by itself).
 * Ore worth anywhere between $500 and $10M have their ore value multiplied by 5 (which can be looped until it reaches $10M).
 * Ores worth more than $10M have their value multiplied by 3. However, this only happens once, or twice with a Tesla Resetter.

Trivia

 * Winterheart is the second upgrader in Miner's Haven to have a variety of effects for many orevalue ranges; the first being the Ghost of Christmas Past.
 * Winterheart is the first upgrader capable of exponentially increasing ore value, although it only does so on ore worth less than $500. 500 * 500 = 250K. Exponents on high value ores would be overpowered. Example: 1T * 1T = 1Sp.
 * The giant tree located on the upgrader isn't collidable, meaning you and any ore can go through it.
 * Awarded to those who had the Shiny Nicely Wrapped Gift.