The Arcane Amplifier is a Reborn Fusion Tier Upgrader that seems to be a fusion of the Arcane Lightning and Virtual Enhancer. It acts similarly to the Virtual Enchancer, but stronger. The Multiplier will get stronger the further it is away from the dropper. The Multipliers got were ranging from 2x all the way to 51.5x. The max multiplier can be reached easier if the player has the Executive and Knowledgeable Gamepass to increase their baseplate size.
Overall a decent upgrader, but the best way to use this is by putting all the other upgraders first, and trying to take on this one as far as you can go to achieve maximum value if you do manage to stumble on this item.