# Mechanics and Concepts NFTs: Playing Rifters: Kalinvale requires using an NFT as your player character. All of your progress is saved to that character. Items, Gold, Diamond, Progress, Trophies, Classes, Stats, Health, Energy, Faction, Effects, are all saved into the game system and accessed by ownership of the NFT. On Ethereum, you can use Outlanders, Bored Ape, Mutant Ape, Eth Lizard, CloneX, Squishy, Doodle, Azuki, CoolCat and some additional community NFTs that have not been chosen yet. The power and stats of the different factions is based on the nature of the Collection, its floor price, and its community engagement. Outlanders are loner underdogs and treated differently than the collection/DAO/Factions. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://c1-community-first-games.gitbook.io/rifters/rifters-kalinvale/mechanics-and-concepts.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.