# Arcadium crystal Arcadium crystals are very powerful NFTs that can be obtained by opening the following packs: * [arcadium-capsule](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/arcadium-capsule "mention") * [heavy-container](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/heavy-container "mention") Arcadium crystals were initially discovered by Phemautaz, a clandestine miner who established an illegal network to sell these crystals. After dismantling the network, the Arcadian Council analyzed the Arcadium crystals and determined that they are a perfect aggregate of the four main Arcadium resources. However, the council never managed to catch Phemautaz, who escaped. It is not known how many Arcadium crystals are present in Arcadia, but these elements are far rarer than Constructium, the scarcest resource.

Overview of an illegal mining site used to extract Arcadium. Surface view (left) and underground view (right) of the facility operated by Phemautaz.

The primary purpose of Arcadium crystals is to enhance the rarity of a construction without needing to sacrifice an additional construction template. In the fusion (or standard level up process) process, two level 5 cards of the same rarity are typically required to improve the rarity of one card, resulting in the destruction of the other card. Arcadium crystals can serve as substitutes instead of construction cards during fusion as long as they are level 5 and match the rarity of the construction that needs to be upgraded. Since Arcadium crystals bearing the Ultimate rarity have virtually no purpose, they can be leveled up to Ultimate level 5 and exchanged for 2 construction packs in the blending section. When performing the blend, the player receives a random construction pack (with a 50-50 chance of receiving either a GEN1 or GEN2 pack). **Arcadium crystals don't have a maximal supply.** Each Arcadium crystal has a similar template containing key elements:

Overview of an Arcadium crystal card and its several attributes.

Number	Name	Description
1	Name	Indicates the name of the card.
2	LVL	Level (LVL): Each Arcadium crystal bears a level between 1 and 5. Once an Arcadium crystal reaches level 5, it is possible to either improve its rarity by fusing it with another crystal or to use it to improve the rarity of a level 5 construction matching the rarity of the crystal.
3	GRD	Grade (GRD), also called 'Rarity': Each Arcadium crystal bears a rarity Common (C) and Ultimate (U). To be used, crystals need to match the rarity of the construction that needs to be improved
4	RESM	RESource Mining (RESM): Arcadium crystals have a RESM value of 0, regardless of their rarity.
5	SIZE	Size: Arcadium crystals have a size of 0, regardless of their rarity.
6	ICON	Representation of the Arcadium logo.
7	NFTM	NFT Mining (NFTM): Arcadium crystals have a NFTM value of 0, regardless of their rarity.
8	BONUS	Indicates how Arcadium crystals can be used.