Were to get a air talisman?

you can buy 1 at the grand exchange

Find it or the alter? ___ Sometimes goblins drop talismans that my answer ___ The alter is located south of falador.

There are three ways to find an air talisman, 1. Kill Goblins and/or Air wizards. 2. Buy one off the G.E.. 3. Complete the Rune Mysteries quest. Killer5x8

You can find it by obtaining it as a drop, from a goblin is the easiest way to get another replacement.

Level 2 Goblins, Air Wizards (South Of Falador) are known to drop them, or you can buy them off another player using the Grand Exchange.