> For the complete documentation index, see [llms.txt](https://waifus.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://waifus.gitbook.io/whitepaper/introduction.md).
# INTRODUCTION
A TCG for Collectors
Welcome to the world's first TCG that integrates the revolutionary Proof-of-Liquidity (PoL) system at its core: Underground Waifus, a multiplayer TCG (Trading Card Game) based on a cyberpunk universe, focused on a very specific vertical: Waifus in a post-apocalyptic future.
One of the main sources of innovation is that it proposes a circular economy model that combines F2P (Free to Play) and P\&E (play and earn) business models with the tokenized economy.
In this innovative TCG, you don't just collect powerful cards, build decks, and compete against other players; you also have the opportunity to become an integral part of the network on which the game is built.
{% embed url="" %}
Trailer
{% endembed %}
The universe of Underground Waifus takes place in the future, corrupted by the scarcity of materials, money: stardust, and the desire for power. An eternal war between different races and more than 9 factions.
The TCG is focused on a competitive side, with an easy player-driven economy: PVP (player vs. player) battles, and the player who wins takes it all.
The use of blockchain technology and assets in fungible or non-fungible tokens (NFT) empower the concept of TCG and digital collecting, with a limited supply of collections and future new limited collections on the different known blockchains that are annexed to the project.
Players are the holders of the assets, either for mere collecting or playing, and can generate value for their invested time.
Welcome to the first TCG on Berachain, with no barriers to entry and hybrid F2P and P2E for all players!