some of these, to my knowledge, need some minor rewording to be a bit less clunky to read but other than that i'm really into the different effects and gimmicks, if you wanted to dip your toes into alchemy a bit I'd suggest a platinum as a potential boss monster (since you already used silver, the metal of the moon), either as a fusion of gold and silver (the alchemical symbol for platinum is literally just the gold and silver symbols next to each other because it was believed to be a composite of the two) or a rank 3/4 Xyz, possibly one with a sort of reverse gemini effect that makes it a normal monster when it runs out of materials, maybe a level 1/2 "moonfang ore pup" that can SS one of the others either on death or by self sacing
Greens expensive as a 3/3 for 5 mana, especially a 3/3 that you need to risk in combat if you want to trigger its ability
Only one of each type of these exchanges has been printed thus far
I know the overworld in this build is pretty broken if nothing else
See also: Chase card rankings, Binder layout planner How much does a Fusion Strike master set cost? A complete Fusion Strike master set is estimated at $2,629 based on current TCGPlayer market prices