You have access to these Maneuvers:

Parry: The Character gains a +1 to all saving throws for 15 minutes.
This can be used as long as you have 2 superiority dice left.

Menacing Attack: When a creature within 2 foundations of you uses a spell, you may try and interrupt the spell by causing them intense fear. They must succeed on a contested casting attribute roll or have their spell or ability be interrupted. You may only use this once per day on the same target. This falls outside of initiative and is resolved immediately, but it also takes your spell from the turn order.
This will cost 1 superiority dice to accomplish, and they will be feared for 15 minutes.

Maneuvering Attack: You may move to intercept a spell or attack for an ally at the cost of 1 superiority dice. Take half the damage of the strike intended for your ally, and they receive none. This falls outside of initiative and is resolved immediately, but it also takes your spell from the mechanical combat turn order.

Commander’s Strike: Burning a superiority dice you leap towards an opponent within 3 foundations and stand in front of them. This will cost 1 superiority die. You may only use this once per day.