is Nahual a one-time use?

    when i was reading one of the guides for the Barbarian crystal event, it sounds like Nahual is a one-time use. is that correct ? i don't want to accidentally waste him :-)

    Nahual is a special type of spy:

    1. If you send 1 Nahual and your opponent has no Nahuals, your Nahual disappears, but you are able to see the movement of the opponent’s army.

    2. If you send 100 Nahuals and your opponent has no Nahuals, you will still lose only 1 Nahual, not all 100.

    3. If you send a Nahual in an attack, he may either remain in your army or be lost together with the rest of the army.

    4. If you are attacked and you lose the battle, the Nahual switches sides and joins the winner.