AO Astral Spider
Since my game is moving into high tier play and some Astral adventures, I homebrewed up an Astral Spider that is loosely based on the Phase Spider. You may need to lower things like To Hit, AC, and the amount of hatchlings as I balanced this creature for my totally unbalance game. The fly movement speed is based on the Intelligence of the creature and is only available in the Astral Plane.