OpenSea Adds Chromie Squiggle to Flagship Collection

**Youmio AI** has launched a free mint for their **Captain's Hat SBT** (Soulbound Token) collection on OpenSea. Key details: - Free mint currently live on the platform - Collection focuses on AI character development - Users can claim and wear their Captain's Hat SBT - Available through [OpenSea collection page](https://opensea.io/collection/youmio) This launch represents Youmio's entry into the **AI character space**, offering users digital wearables through soulbound tokens. The free mint model allows broader access to their initial collection. *Check the collection page to claim your Captain's Hat SBT while the free mint remains active.*

**Major blockchain performance upgrade** as Solana reduces transaction finality time to just 150 milliseconds, significantly improving network speed. Other key developments this week: - **OpenSea launches OS Flagship Collection** - New premium NFT offering from the marketplace - **Coinbase One integrates with OpenSea rewards** - Enhanced benefits for premium subscribers - **Doodles teases Froot Loops collaboration** - Popular NFT brand hints at cereal partnership - **CyberKongz deploys $KONG token on Ethereum** - Gaming-focused NFT project launches native token The Solana upgrade represents a significant technical achievement in blockchain infrastructure, potentially setting new standards for transaction speed across the industry. [Read full digest](https://opensea.io/blog/articles/opensea-digest-september-11-2025)

**Treasure chests are arriving Monday** - the question remains whether you'll discover yours. This appears to be part of an ongoing series, with **Episode 2 available for viewing** for those who missed it. Previous episodes have revealed the contents of these mysterious treasure chests, following characters Ziggy, Jeff, and Tuesday on their journey of discovery. The arrival marks the next phase of what seems to be an interactive treasure hunt or gaming experience.

**Jack Butcher**, founder of Visualize Value and creator of iconic NFT collections Checks and Opepen, is launching **Gas Wars** on Art Blocks. The upcoming generative art release explores **survivorship bias** - examining what endures versus what breaks in digital culture. **Key Details:** - Launch date: September 17 - Platform: Art Blocks Curated - Concept: Destruction as artistic commentary - Artist: Known for minimalist, thought-provoking visual work Butcher's approach questions why certain digital artifacts survive while others fade, turning economic and cultural forces into visual art. The project represents one of the final releases in Art Blocks Curated history, marking a significant moment for the platform. [Read full interview](https://opensea.io/blog/articles/in-conversation-with-jack-butcher)