Arbitrum Odyssey Week 2: Update on @AboardExchange and @tofuNFT

The trading card game (TCG) market is evolving with programmable blockchain technology. **@onemoarchance** is building on Arbitrum to transform traditional card collections into liquid, social experiences. **Key developments:** - TCG collections becoming programmable and tradeable on-chain - Users can interact socially around their digital card ownership - Platform launching on Arbitrum's L2 infrastructure **Community event:** Live pack opening session scheduled for next Thursday at 9pm ET on X, featuring over $1,000 in prizes. This represents a shift in how collectors engage with trading card games, combining the traditional hobby with blockchain's programmability and liquidity features.

The **Arbitrum Foundation** has opened applications for its **Open House London Buildathon**, a global online program designed to help early-stage teams build onchain products. **Program Details:** - Combines builder program with startup accelerator - Focuses on AI, payments, and DeFi primitives - Targets founders entering the programmable economy - Built on the Arbitrum Platform The initiative aims to support teams transitioning ideas into functional onchain products through structured guidance and resources. [Apply here](https://arbitrum-london.hackquest.io/)

**Arbitrum Foundation** has selected **13 teams** from over 900 applicants for its first **8-week Mentorship Program**, focusing on AI, payments, RWAs, and emerging DeFi. **Program highlights:** - Hands-on support from [Pendle](https://twitter.com/pendle_fi), [Variational](https://twitter.com/variational_io), [IOSG Ventures](https://twitter.com/IOSGVC), and [Horizen Labs](https://twitter.com/HorizenLabs) - Structured guidance on product strategy, go-to-market, liquidity design, distribution, and fundraising - Culminates in a **$100K Demo Day** featuring top VCs including [Pantera Capital](https://twitter.com/PanteraCapital), [Electric Capital](https://twitter.com/ElectricCapital), and [Lightspeed Venture Partners](https://twitter.com/lightspeedvp) Teams will refine their products and connect directly with investors throughout the program. [Read the full announcement](https://blog.arbitrum.foundation/meet-the-builders-the-first-cohort-of-arbitrum-mentorship-program/)

Thirteen early-stage teams are building infrastructure for the programmable economy, spanning DeFi, institutional trading, and real-world asset integration. **Key Projects:** - **CarbonTerminal**: Bridges offchain liquidity onchain with 750+ markets - **PrismFi**: DeFi superapp combining trading, launching, and prediction markets - **LayerV**: Institutional-grade options trading platform - **t3tris_finance**: Infrastructure for asset managers running onchain strategies - **twynexyz**: Unlocks borrowing power through credit delegation - **capa_fi**: Cross-border payment infrastructure for emerging markets - **EstateProtocol (USDre)**: Standardizes real estate as DeFi collateral - **reinforce_fi**: Self-custodial yield-bearing onchain dollar - **tiltprotocol**: Converts strategies into tokenized funds - **bondoncredit**: Credit scoring and lending for AI agents - **Kustodia_mx**: Onchain escrow for high-value LATAM transactions - Two additional projects to be announced These teams are building the infrastructure layer that makes global markets fully programmable onchain.

El Dorado has introduced an **International VISA Card** that enables global USDT payments powered by Arbitrum. **Key features:** - Pay, send, and receive USDT worldwide - Low transaction costs with instant settlement - 24/7 accessibility - Eliminates traditional payment friction The card builds on El Dorado's existing platform, which serves **over 1 million users across 7+ countries in Latin America**. The company addresses regional challenges including inflation, high transfer costs, and limited USD access by converting stablecoins into practical financial tools. Users can save, send, convert, and now spend digital dollars through USDT on Arbitrum, all within a single application. This development represents a step toward making cryptocurrency-based payments more accessible for everyday transactions in markets where traditional banking infrastructure faces limitations.