Starting at 1st level, when you reduce a hostile creature to 0 hit points, you gain temporary hit points equal to your Charisma modifier + your warlock level (minimum of 1).
Dark One's Blessing
Raw data
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"srd": true,
"name": "Dark One's Blessing",
"page": 109,
"level": 1,
"__prop": "subclassFeature",
"header": 1,
"source": "PHB",
"entries": [
"Starting at 1st level, when you reduce a hostile creature to 0 hit points, you gain temporary hit points equal to your Charisma modifier + your warlock level (minimum of 1)."
],
"className": "Warlock",
"classSource": "PHB",
"subclassSource": "PHB",
"subclassShortName": "Fiend"
}