Endgame Builder Golems (Survival Construction Helper)

I have an idea for a strong Minecraft endgame feature. After finishing the game, players often lose motivation, but mega builds keep the game alive. Creative mode is perfect for designing them, but rebuilding everything in Survival takes forever. I love the Survival feeling, but for building, Creative is a thousand times better. Using Creative directly in a Survival world would break the game, so this feature would give players the best of both worlds.

The idea: introduce builder golems that can construct a player-made schematic in Survival, slowly and reliably, using materials you provide in special chests. The Survival aspect stays intact because you must gather every block yourself. You design in Creative, save a schematic, load it in Survival, place the chest and a schematic pedestal, and the golems build it layer by layer. They could even use scaffolding to reach higher areas, which would look great and feel very natural.

To make this true endgame content, activating the golems should require something rare from far out in the End — for example Enderite, a material similar in rarity to Netherite but only found on remote End islands. A special core crafted from Enderite and/or all Netherite tools, plus a beacon nearby, could bring the golems to life.

Optional: mining golems that clear terrain without dropping items, to keep things balanced.
This system would also inspire many new mega builds shared by the community.