Siphon Aether

You consume an Aether Crystal and regain +2 Mana, up to your maximum Mana.

If you know this spell (whether via an Ability or an item that allows you to cast it as if you knew it), you can consume an Aether Crystal to directly fuel another spell with a Mana cost of 2 or less, without absorbing the Aether Crystal’s Mana first.