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Hope you’ve brought something to warm yourself up when you head into the Climate Control region in the northernmost area of the pond inMudborne- not all the frogs in Climate Control got so lucky when the storm hit and froze the area over!
As you explorethe Climate Control map, you’ll find plenty of uses for a Heater, whether that’s to thaw out frozen frogs, fix the Climate Control machine to restore the area to normal, or to bring home with you and work on cultivating all kinds of new mushrooms that require warmer conditions to begin sporing.

Turn Up The Heat On Command
Thaw Frozen Frogs And Machinery
Dendro tells you it’s snowyin the Climate Control region, but so much of what’s been left behind up there has completely frozen over by the time you arrive, including Annura, the Caretaker of the region who resides at theCaretaker’s Restbuilding on the eastern side of the map. After you’ve useda high Umbrage frogto thaw her out, she’ll offer a wealth of items in her trading shop. One of them is key to navigating the chilly Climate Control region: the Heater, which Annura will trade forthree Croakfoots and five Logs.Croakfoots grow in the reedsin Climate Control.
With Heaters in hand, you’ll be able tothaw any ice in the Climate Control regionby simply placing your Heater down on the ground nearby. This creates afive-by-five grid with the Heater in the center, and once you’re happy with the location, you canplace a high Umbrage froginto the machine to turn up the heat. You can tinker with this by thawing different sections of the region to save frogs, but the Heater has a big story purpose as well.

While you need the Cooler instead to make your way out to thethree frozen sensorsthat are preventing the machinery in the Climate Control building from functioning as intended to manage the chill in the region, it takes a Heater or two tothaw the frozen weather sensorsaround your map. You can find the three sensors you need to thaw bylooking for three large X markson the map. When you arrive,place the Heater with the right frogto thaw out the machinery.
One sensor is just east of the Forecasting building, another is south of the Caretaker’s Rest, and the third is south of Food Storage and the Storage pool, beside one of the Frogham Markers that suggestnew frog speciesyou can make using the mushrooms native to that region and its dream world counterpart.
Make Mushrooms That Require More Heat
The Encyclopedia offers plenty of helpful hints on where to findall the mushroomsin Mudborne, information that only gets expanded upon as you continue to harvest and use the spores. A few of them, you’ll notice, mentionincreasing an area’s heatbeyond natural levels, and this is accomplished byplacing a Heater near Cultivatorsthat have beenfilled with compostto encourage mushroom growth inthe hotter weathernearby. The heat-specific mushrooms are:
You’ll need a Frosty Jack if you’re following the Compendium to make progress through the story.