You gain the following maneuver options.
Inexorable Spell
When a creature succeeds on a saving throw against a spell you cast, you can take a Bonus Action and expend two Battle Dice to force the target to reroll the saving throw with Disadvantage.
Sanguine Spell
When a creature fails a saving throw against a spell that you cast, you can expend two Battle Dice as a Bonus Action to render it susceptible to damage. Each time the target takes damage until the end of your next turn, it takes extra Necrotic damage equal to one roll of your Battle Die.