Caster changes the rules of the game

The fight between Berserker and Caster has taken its toll on both servants. Several lives have been depleted from Berserker's stock, while most of Caster's stored Mana has been depleted. The deep purple dome that encompasses the temple prevents Caster from quickly siphoning Mana, while continuing its constant drain on her personal supply.

Berserker breathes heavily as the pair stare at each other. Berserker, down to one life to live. But at the cost of his lives, comes the greater cost of Caster's mana. She's had to cast progressively more powerful spells to get past Berserker's Noble Phantasm, God Hand. The last life, basically took everything she had.

Illya grins. "What's the matter, Caster? Looks like your mana's run out. And my onii-chan is making sure you're not getting any more. Too bad~" Illya sings before casting Caster one last look. "Berserker. Finish the job."

Berserker moves in close for the kill. There isn't any spell left in Caster's repertoire that can hurt the behemoth Berserker. Though it won't even cause any damage, she has **** but to try... "Rule Breaker." Caster says as she produces a jagged dagger and strikes Berserker.

A flash of light as Rule Breaker nullifies the resistances built up by Berserker. "No!" Illya exclaims. "What did you do to my Berserker!?" Caster's lips turn into a tired grin. "Cut him down to size." She says as she quickly chants the highest level spell she has in her arsenal, using up the last of her Mana.

"Berserker!" Illya calls as Berserker roars, swinging for what is surely the final blow too fell Caster once and for all...!