Magical Gem

The Magical Gem is a special material that the Elite Scientists Monkey Co. discovered! It has 5000 HP, and stays in the center of the track for 10 seconds. For every HP it loses you gain $1! These only appear in off-story Special Missions though...

It also has a 22% chance to drop a Magical Shard (which has 6 variants). If you put all 6 variants, each in each slot in the Crafting Menu, you will get a copy of it, which, when implemented on a tower, will make it get 3x as much money, deal 2x more damage and EXP, will completelly heal it and will have 20 more maximum HP! If implemented on a bloon, it will deal a whooping 5000 HP!