Pactless

You take power for your own. No pacts with gods or demons, your magic is stolen rather than on loan.

Improvised Incantation

1st Level. Once per short rest, when you cast a Warlock spell that uses verbal components you can alter up to three letters of the spell to change the effect. If the spell deals damage it must mimic the damage of a spell you can cast of the same level.

Nullify Cast

6th Level. When you succeed a saving throw against a harmful spell affect you take no damage instead of half.

Spell Thief

10th Level. When you witness a spell cast an identical spell using a Warlock spell slot. The spell's level must be equal to or lower than your Warlock spell slots and you cannot replicate spells that consume material components. The first time you use this ability after a long rest it does not consume a spell slot.

Full Counter

14th Level. The Counterspell spell is always prepared for you, and you can cast it as a Warlock spell. Whenever you successfully counterspell, the spell is reflected back at the caster. If the spell is variable in affect, such as the Wish spell, you can determine the outcome in accordance with the DM's ruling.