Deviant cantrips

This is an Eldritch Invocation.
The power your patron has bestowed into your eldritch blasts seeps to other cantrips of your preference. Choose 3 cantrips other than Eldritch Blast that you know from the warlock cantrip list. You may choose to divide the damage dice of your chosen cantrips between multiple targets or into a single target (Except if its range is "touch"), and perform a separate attack roll for each die regardless of distribution. If the cantrip uses a saving throw, the DC is increased by 1, this effect can stack. If a creature is targeted by multiple damage dice of a cantrip that requires a saving throw, they only roll one saving throw for all dice.

If you know Agonizing Blast, when your selected cantrips hit, you add half your charisma modifier rounded up to each damage die; At 8th level you add the full value. If you know Eldritch Spear, your selected cantrips increase their casting range by half their normal range, unless said cantrip has a range of touch. If you know Kiss of Mephistopheles, you can use your bonus action to cast Fireball using one of your Warlock spell slots centered on one of the targets.