Jewels

Jewels are used to buy premium items, building s or doing a special summons and a lot of other things. They are very versaitle but very rare to actually acquire some during the gameplay but can be bought with real money at any time.

Most common use of jewels are to buy special buildings that provides you with an extra boost against archwitches, like increasing the encounter rate of an archwitch and battlepoints to grind archwitches. Those "special" buildings cost [500] Jewels each.

Obtaining jewels without purchasing them with real money
Jewels can be found as an quest reward, login bonuses or sometimes as an (apologize) gift from the server administrators. They can not be found naturally and archwitches do not hold jewels as rewards.

Though, managing your free jewels that you get from those sources only is very important. Do not waste them unless you want to gamble and try out your luck to draw an SR/HSR (or desired R cards ) in the premium summon for [100] Jewels for the first time or [300] Jewels!

Price list of jewels
The current prices for jewels (taken from the official in-app prices on the Apple Store ) are: