Bloon essence

bloon essences are the most common drops, yielding 1 essence every 20 bloons of that color popped on average. (5%)

they can be compressed up to 10 times, 4 of on elevel to make next, getting stronger every compression. also, they can be used (50) to make a _ogen reactor depending on which type used. 50 and a crystal of that type make a tower boost, increasing its stats by 10% more than the last level.
 * AS CRAFTING INGREDIENTS