Dark Sun

The Dark Sun is an ultimate-tier post- Dark Plasma Boss item essential to progression. It has 2 purposes. First, it triggers an event that allows the collection of dark bloontonium units and dark infusion essence from bloons for 1 day. It is infused and is made by putting a Sun Relic (dead sungod item) and infusing it with 2 dark lenses and 8 dark bloontonium units. it makes it a 1/10000 chance to drop from any bloon for essence, and a 1/500k for dark bloontonium. It is necessary for getting enough dark bloontonium to fit the demands of late-game, as you can only beat the DPB once. If you run out, there is a way to get more by dissolving 1,000,000,000 units of material or item, and getting 1,000-65,536 Dark Bloontonium Units from it.

Its second use is the transformation of the sun in the game to darkness, granting all sun powers 4x stronger in all areas, including fire-rate and range, and allowing progression into the third era in the game- the Darkness Era.