The Illusionary

The Warlock doesn't actually use spells but if they can convince everyone around (one charisma throw) Then the patron of the warlock will drain the health of the enemy that is being targeted of its health exactly how much the spell would have done.

Extreme Illusion

Extreme Illusion makes it where instead of rolling 30 dice because the warlock casted a spell in a crowd they need to only roll once and everyone that needs that check uses the same roll no matter if it works or not if one creature is persuaded everyone is. 

OTHER PC's DONT COUNT FOR THIS ROLL

The Monstrosity

If one single person isn't convinced by the Extreme Illusion, they will see the warlock's patron and instantly fill with fear and dread.

The patron looks horrifying to everyone other than the PC's Who isn't affected by Extreme Illusion unless being hit by a spell from the warlock.

Master of Illusion

You become very good at convincing creautures.

Powerful Illusionary

Your patron if fully powered and is able to spare some of it to steal more from creatures around you. You can cast this spell making every creature around you take 2d12 Necrotic damage

your DC for this spell only is 35