Elan!

Upon casting, the paladin shouts and raises it's weapon, then begins a mighty charge. This charge has 1.5 times the base movement speed of whatever mount the paladin is currently riding. After 10 feet of charging, two spectral paladins, each visibly identical to the paladin (unless there's a cool lore reason, such as a dead brother) appear on either side of the paladin, five feet away and five feet behind. Each paladin can attack once at any creature in range per five foot travelled, though the spectral paladins deal half the damage of original, though smite can still be applied at full power. A creature can only be attacked once by any single paladin.

Whilst charging, any enemy that a paladin has attacked, regardless of whether or not the attack hit, must make either a con or dex saving throw, with the paladin's spell save DC. Upon making a successful dex save, the creature dodges out of range of the charging paladins, without opening itself up to reaction attacks, and takes no damage. Upon a successful con save, the creature takes no damage but remains where it is. If the creature fails either of these saves, it is knocked prone and takes 3d12 bludgeoning damage. The steeds upon which the paladin ride cannot make attacks during this charge.

Additionally, this spell can also be cast at fifth level, which adds an additional paladin five feet away from and behind the already summoned paladins, for a total of five. The charge attack deals an extra 1d12 bludgeoning damage.