5e SRD >Feats >

A Taste of Power

Prerequisite(s): not a warlock, magic initiate feat

You’ve been granted spells from a patron, now you can gain a bit more power from the same patron. A little more power never corrupts. Choose an otherworldly patron from those available to the warlock class. You gain the level one abilities of that pact. If the abilities refer to your warlock level, your level is effectively one quarter your total level, minimum 1. If you gain a level in warlock, you lose this feat and may retain it to a new feat.