Aether rune

Aether Rune is a members-only item on the OSRS Grand Exchange in the runes category.

In-game examine text: "A combined cosmic and soul rune."

It has a Grand Exchange buy limit of 25,000 every four hours, a high alchemy value of 180 gp, and item ID 30843.

View on OSRS Wiki

Aether Rune shows an active flip setup with a margin of +6 gp and 5,823,493 trades over the last 24 hours.

At the buy limit of 25,000 every four hours, max profit per cycle is about 150.0k gp — high margin with healthy liquidity.