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
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
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
During either player's turn, when a Spell Card is activated that targets exactly 1 monster you control (and no other cards): You can negate the activation
You can often deploy yourself to follow up, play Filey to deal burn damage, or play Waterry to draw