
Y'know, if you've been playing crob for a while, ya know the only few gachas we have are (thankfully) treasure and cosmetics.
And I'd like to shed light on how fucking ridiculous they are.
The biggest rate you can have for an epic treasure is 5.1% (bonus treasure and epic treasure rate. From empiric experience, I do believe the 2.1% refers to each).
This would mean you get 1 every 20 draws, roughly.
You do need 15 copies of a treasure to have them — that means you need 294 draws, or, 27 10+1 pulls, on average. In other words, 51k gems.
Obviously, though! For new treasures you do get the 3 copies from guild rewards (which deducts about 5 pulls from the total, bringing it down significantly; about 40k) and you could craft a treasure encantantion, another one you get from mastery. It's not as bad as it could be. Your selected treasures will be about 30-35k each themselves, since you have 3 you want. You could argue for 30k mostly because of the mileage you get, since, in 90k (the amount you realistically need to spend to max out a single treasure you want, in case you don't have other two you need) you get enough mileage for another epic treasure.
But still! It's SOOOO expensive!