Originally Posted by Nightmarian
Originally Posted by dwig
Originally Posted by RagnarokCzD
Originally Posted by crashdaddy
No. Those were never invocations.

I would dare to say they were:
http://dnd5e.wikidot.com/warlock:eldritch-invocations

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Lifedrinker
Source: Player's Handbook
Prerequisite: 12th level, Pact of the Blade feature

When you hit a creature with your pact weapon, the creature takes extra necrotic damage equal to your Charisma modifier (minimum 1).

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Thirsting Blade
Source: Player's Handbook
Prerequisite: 5th level, Pact of the Blade feature

You can attack with your pact weapon twice, instead of once, whenever you take the Attack action on your turn.

To clarify, a hexblade with the blade pact who takes the lifedrinker invocation adds charisma bonus to damage TWICE. A blade pact warlock of any other patron adds str or dex once (depending on weapon) and charisma once, provided they have the lifedrinker invocation.

2Xcharisma mod is fairly powerful, but it doesn't come online until level 12, so I think this is fine.

Also, I sincerely doubt that they are giving blade pact warlocks the thirsting blade invocation "for free". They will still have to pay for it with an invocation.

Well, it's part of pact of the blade now, though you have to be level 5. Basically, turns you into a martial. I do agree that Thirsting Blade will either be gone or do something else. More correctly, I think it'll be replaced by a new evocation with other features from hexblade and/or the rest of Hex Warrior. If you want the extra melee attack, just take pact of the blade.

Lifedrinker lets you add charisma to your DAMAGE rolls.
If you are anything other than hexblade, that means you deal for example 1d10+str+cha. With hexblade of course 1d10+cha+cha (if the damage die of the weapon was 1d10)

However, crucially, unlike hex warrior, it does not add anything to your ATTACK rolls. Your attacks do not become more or less accurate. With something like +3 str, you miss a lot more than with +5 from charisma. That is really the difference.

Hex warrior increases accuracy, lifedrinker adds more damage (hex warrior adds cha-str, so something like 2 usually. Lifedrinker adds cha, so 5)