Notes:

The original doomspire structure has been used in many places around Roblox since it was created, but it actually had a sequel.
Stats on the place say only 312 people visited it before the creator leeornet got banned and it became impossible to visit.

I visited the place back then, and from what I remember this structure didn't split apart into slices like the first doomspire does.

Links to the places:
The first doomspire
The second doomspire
For some reason the second one has no thumbnail, making this ad the only known image.

Each place has lore in their descriptions:
"From the top of the tower, Teferi watched over the once green land. His minions had carved a path through the trees that had once covered Keld, a sinuous scar that spidered out from his shimering Doom Spire. 'Soon…' He thought to himself, fingering the bright panels on the console in front of him."

"After his defeat in Keld, Teferi swore revenge on the vermin that destroyed his tower. It wasn't long before his new tower was built. Larger, stronger, more formidable, his new Doom Spire would strike fear in the hearts of all who dared to defy his rule. His insidious plans would continue uninterrupted this time."