ArcaneTome

This may be a bit late but if you delve into botania enough to fight it's final boss the Gaia Guardian it can drop an item that allows you to save up to 12 locations as quick teleport points. It's interface works in a similar way to the assembly halo.

Wait, I know what you're talking about. The obelisk on eerie island is an odd one, unlike every other one it seems to spawn with a pure node in it. (Or at least the one in my world did.) Since the opening does specify that it has to be a sinister node that could be the problem.

Getting the same thing here which is odd considering my brother's server updated just fine a few hours ago.