A Finisher is performed by reducing an enemy to low health (enemy health can be seen by holding to target them) and using a certain Witchcraft. If the enemy is sufficiently weakened you will be prompted to press and pressing in time will kill any and all non-boss enemies caught in the Witchcraft that triggered the Finisher. All ranks of Mag Mell's Rose, Vlad's Impaler, Colchis' Trap and Enoch's Hammer can trigger Finishers. No other Witchcraft can. On Squire, weaker Homunculus enemies such as the ones on episode 8 are a good source of Finishers. After only a few scythe hits, a level two trap will trigger a Finisher on one. Killing multiple enemies with one Finisher will count for as many Finishers as there are enemies. Take advantage of Mag Mell's Rose III on easier difficulties for easy Finishers. For an easy way to grind out your Finishers, go to episode 19 and use Colchis' Trap I and II repeatedly against demon Faust's legs.