Some of the essential materials are too hard to get or players can't even work to get it. For example the vortex pearl..it is IMPOSSIBLE TO GET ENOUGH to be able to fuze to orange because it is only offered in tavern. Most of the material chest come with a note "may contain blue/purple/gold materials" but the chances to get those kind of colored material is so slim including the that was sold in packs...its a WASTE OF GOOD HARD EARN MONEY for players to buy diamond packs which end up ONLY TO HAVE WHITE GRADE MATERIALS.
Its pretty damn hard to get it before but with the new Combat grounds update it feels alot better to get them. Hoping to get the rare materials from the tavern is way too unrealistic.. I used up 100s of recruitment scrolls and only get 1 common grade of the ultra rare material lol.