While unarmed, wearing no armor and wielding no shield, you lose all spells and class actions, and gain:
Warlock Level 1: Multi Punch. Warlock Level 2: Feather Body. Warlock Level 3: Magic Fists. Warlock Level 4: Extra Attack. Warlock Level 5: Extra Attack. Warlock Level 6: Extra Attack. Warlock Level 7: Extra Attack. Warlock Level 8: Extra Attack. Warlock Level 9: Extra Attack. Warlock Level 10: Extra Attack. Warlock Level 11: Extra Attack. Warlock Level 12: Extra Attack.
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Multi Punch: You make 2 Unarmed Strikes. When you hit an enemy with your Unarmed Strike, the damage of your Unarmed Strike is increased by 1 until the combat ends.
Feather Body: You add all your modifiers to your AC and are disengaged. Your speed and jump distance are tripled. You take no falling damage and land on your feet.
Magic Fists: Your Unarmed Strikes count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.
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Explainer
Concept: Class on item. Starter item.
Gameplay: Death by a thousand cuts.
Lose spells and class actions: Big reset.
Multi Punch: 1 Attack, 2 hits. Base damage: 1 per hit. Ex: Attack1: 2 Dmg. Attack2: 4 Dmg. Attack3: 6 Dmg.
Extra Attack: Granular: Low damage, Lots of attacks. Every Warlock level between [4-12] comes with an Extra Attack, increasing how fast Multi Punch stacks.
Feather Body: Passive. Permanent. No rest nor recast.