Dai-Guard: Terrestrial Defense Corp. S01 E07 Fire and Ice

"Make the coffee! File the paperwork! Save the world!"

Things get boring for the team when they are forced to go on standby for a week after a mushroom-shaped Heterodyne with regenerating abilities appears. But events only take a turn for the worse when the Heterodyne activates and starts creating smaller mushrooms that destroy the surrounding city.