Banishing Smite (Revised)

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the weapon's range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and your weapon crackles with force, causing attack to deal an extra 5d10 force damage to the target, or half as much on a missed attack.

Additionally, if this attack hits and reduces the target to 50 hit points of fewer, you banish it. If the target is native to a different plane of existence than the on you’re on, the target disappears, returning to its home plane. If the target is native to the plane you’re on, the creature vanishes into a harmless demiplane. While there, the target is incapacitated. It remains there for 1 minute, at which point the target reappears in the space it left or in the nearest unoccupied space if that space is occupied.