The Infinite

You have struck a pact with a being of eternity, infinity, of forever, beings like this might consist of a sentient divine light, a creature at the edge of the universe, or some other being of incomprehensible power, beings like this make even Great old ones go insane with the amount of power they have. 

Eternity's Luck

At 1st level, whenever you make an ability check, attack roll, or saving throw, you can reroll the d20 and choose the higher roll.

once this feature has been used, you can't use it again until you finish a short rest.

Power of the Infinite

also at 1st level, You can manifest some of your patron's power...whenever you hit a creature with an attack roll, you can call upon the power of the infinite to try and stun the creature, the creature must make a Charisma saving throw or be stunned for 1 minute, while stunned in this way, a creature is blinded.

you can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a short or long rest.

Eternal Might

At 6th level, you have become a being so close the infinite you can feel the effects already starting to change you, you can no longer be charmed, frightened, blinded, or deafened, and if a creature tries to apply this effect to you they instead take psychic damage equal to half your warlock level (rounded up), this psychic damage ignores resistance or immunity to psychic damage. 

Unending Force

at 10th level, you have become a being so close to the infinite you can feel the effects already starting to change you, whenever you fail a saving throw, you can use your reaction to cause the creature who forced the saving throw to make the same saving throw, if the creature fails, all effects of a failed save from that saving throw transfer from you over to that creature (i.e., if they casted charm person and you got charmed, you could charm them instead) if the creature succeeds, you keep your effects. the effects of a failed save ignore the creature's immunities and resistances (including advantage on stuff like fey ancestry). 

Once you use this feature, you can't use it again until you finish a long rest.

Infinite's Strength

at 14th level, you have become so powerful that you are almost the same power as the Infinite, you are immune to all conditions except Invisible, Grappled, Restrained, and Petrified, and you have resistance to all damage except psychic and force damage. additionally, whenever you fail a saving throw, or miss with an attack roll, you can choose to succeed/hit instead, once you use this part of the feature, you must finish 2 long rests until you can use it again.