This is the first time seeing a broken portal like this one. I found a weird broken portal buried in the desert near a pyramid and a village. The village is on the side of a small mountain. When I got it unburied, it was huge! Chest didn't give me much, and I burned through several iron shovels, pickaxes, and lost a few torches excavating the thing. Portal, pyramid, and village are all near each other, easily spotted from the portal location (head northeast). I haven't entered the pyramid yet (playing on peaceful).
Seed 3016319786840766418 (Java 1.21.1)
Location 6693.231 66.0 654.043
by deborah_az