Act Together
Frequency once per round
You and your eidolon act as one. Either you or your eidolon takes an action or activity using the same number of actions as Act Together, and the other takes a single action.
For example, if you spent 2 actions to Act Together, you could cast Breathe Fire (2 actions) and your eidolon could Strike (1 action), or your eidolon could use its Breath Weapon (2 actions) and you could Stride (1 action).
This lets you each use separate exploration activities like Avoid Notice as you travel.
Traits
This indicates abilities from the Summoner class.
Actions with this trait involve you and your eidolon acting in concert. You can't use a tandem action if either you or your eidolon can't act, if you haven't Manifested your Eidolon, or if you've Manifested your Eidolon in a way where it isn't a separate entity (such as with the Meld into Eidolon feat). Tandem actions often let both you and your eidolon take separate actions, but these must be actions taken separately by you and your eidolon; you can't use a tandem action to take another tandem action.