Fate/Grand Order is a free-to-play Japanese mobile game, developed by Delightworks using Unity. if you want to get various items, you need to get more rare prism. here is a full guide on rare prism: what Rare Prism is and how to get it in the game.
What is a Rare Prism?
How to use rare prism
▲ Home screen → MENU → Shop → Enter from the rare prism replacement screen ▲
The current usage is mainly to exchange arbitrary items at Da Vinci’s workshop. The feature is that rare items are lined up compared to mana prism exchange because it is difficult to obtain. The number of exchanges is fixed for each item, but the number is reset on the 15th of every month.
Rare items available
You can get various items that were available for a limited time such as campaigns, including some limited-time events. Since it will be added regardless of genre, there are plenty of variations from those where you can play the whole event to one Valentine’s chocolate dress.
Some items are updated monthly
Like Mana Prism, Rare Prism has items that are updated monthly . You can get gold foes (fou with 1000 or more stats) and lore crystals that you can usually get only a limited number of event rewards.
How to Get Rare Prism?
Sell Servants with 4 or more stars
Rare Prism is basically an item that can be obtained when you sell a Servant with 4 or more stars. However, distribution servants such as Altria [Lily] and Nobunaga Oda are excluded. Basically, think of it as a remedy for the servant with the highest treasure level.
Number of rare prisms you can sell
|4 star servant||1 piece|
|5 star servant||5 pieces|
Obtained at a reprint event
If you have already obtained some of the items available at the event, you will receive a rare prism instead. Basically, it will be distributed only to those who have participated in the reprint event and have obtained the item last time, so even if you think you do not need it, it is recommended to collect it for future rare prisms.
Credit to WIKI