MARBLEX Wallet is an app that allows you to store and manage your virtual assets in the MARBLEX ecosystem. You can find out more about it here: https://www.marblex.io/en
You need MARBLEX wallet to access your INETRIUM tokens.
INETRIUM can be exchanged to ZEM, in-game currency used for tourneys.
ZEM can be exchanged back to INETRIUM at the in-game exchange.