Sure, its an investment to transform the Eye, but remember it can pay for itself, so its effectively 5 mana to craft, and the back side should more than refund itself with the very first spell you cast for free
However, the collecting Samhwanma in the field is very cumbersome in the Samhwan Ma Deck, and it is effective as an effect or effect as it is to leave it without fusion if it is possible
The fact that it costs only Colorless energy is a plus though, since it allows Ultra Necrozma ex to be put in any deck and still attack without waiting for the correct energy
Crustle ex can be obtained from Pulsing Aura pack in the Pulsing Aura set
Newer titles have moved away from the paradigm of the heroes of light collecting the scattered crystals in favor of broader, more convoluted plot-lines, but most games in the series still have a crystalline element somewhere
In this context, ASO is not merely a technical checklist, but a long-term efficiency layer that compounds paid traffic, strengthens organic installs, and improves blended CPI performance