Copper used as guardian laser attractor.

The main use of copper, as of now, besides building, is for the lightning rod. Maybe this electricity attraction property, from a lore perspective, could be elaborated on. For example, the guardians' laser beams, were they to be considered electricity, could be absorbed by nearby copper blocks, giving a sort of protection against the lasers. When exploring ocean monuments, one could get an advantage by regurlary placing down copper blocks, and thus avoiding the laser beams of the guardians. To give it some balance and a chemical flare, perhaps the copper is de-aged (reduced) one step by each laser beam, and when it is completely de-oxidized, it won't protect from the lasers anymore, giving an incentive to create oxidized copper blocks.