Tetris: The Fabled Hexinity (Nullpomino)
Channel: Mister Hungry
Date: 17/05/2020

this is awful but it can be done. It might have been made before, but idk. The building part was sped up to remove all the thinking

I've attempted to build one for quite a bit, but a heptinity doesn't seem possible without either burning lines once you've made the build, or clearing TSDs before you've finished the build.