Excited to present Multi-Party Block Construction (MPBC)! MPBC allows multiple builders to contribute to a single block. -> Blockspace allocation is widened to the view of multiple builders. -> TXs can be included even when filtered by individual builders. MPBC is strictly additive. Builders can only contribute transactions. As a result, block value and blockspace utilization increases. This means more predictable and faster inclusion for users. This initial design reflects the outcomes of multiple blockspace forum workshops, and conversations with many teams across Ethereum. This is a collaborative design to improve the transaction journey, improve Ethereum, improve user experience. All contributions welcome!