Additional Melee Cantrips

As part of building the Magus class, I had to come up with melee cantrips that represent the other elements - my Magus is highly elemental, but built around the elements of acid, fire, cold, and lightning.

I don't see any reason that those should be confined to the Magus class though, so I'm also publishing them here. They're added to the spell lists of the Magus, Warlock, Wizard, and Sorcerer classes.

Blackfrost Blade

• Magus, Warlock, Wizard, Sorcerer
• Evocation Cantrip, 1 Action, 5' range, V/M (a weapon), instantaneous
• As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell's range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects, and they are chilled by back frost - their movement speed is reduced by 10 feet until the end of your next turn. The first time they are struck with a melee weapon during that period, it deals additional cold damage equal to your spellcasting modifier.
• As you reach higher levels, the spell's damage increases. Your melee attack and the subsequent melee weapon attack both deal an additional d6 of cold damage, increasing to 2d6 at level 11 and 3d6 at level 17.

Acid Slash

• Magus, Warlock, Wizard, Sorcerer
• Evocation Cantrip, 1 Action, 5' range, V/M (a weapon), instantaneous
• As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell's range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects, and is splashed with acid - at the end of its next turn (unless the acid has been removed somehow), the target must make a Constitution save or take 2d6 acid damage. The target may use its action wiping the acid away to gain advantage on the save.
• As you reach higher levels, the spell's damage increases - at 5th level, the the attack deals an extra d6 of acid damage immediately, and the damage of the splash is increased to 3d6. At level 11, they increase to 2d6 and 4d6, and at level 17 they deal 3d6 and 5d6 damage.

Shocking Strike

• Magus, Warlock, Wizard, Sorcerer
• Evocation Cantrip, 1 Action, 5' range, V/M (a weapon), instantaneous
• As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell's range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects, and cannot take reactions until the end of their next turn. If they are wearing metal armor, they take an additional 1d6 lightning damage at the start of their next turn.
• As you reach higher levels, the spell's damage increases. At 5th level, your attack deals an extra d6 of lightning damage, and the damage received at the end of their turn increases by 1d6. Both damage rolls increase by another d6 at 11th and 17th level.