Dyrnn's Tentacle Whip

Requires attunement
To attune to this symbiotic weapon, you wrap the
whip around your wrist for the entire attunement
period, andthe whip painfully embeds its tendrils
into your arm. You gain a +2 to atk and dmg rolls,
but attack rolls against aberrations with this
weapon have disadvantage. A creature hit by this
weapon takes an extra ld6 psychic damage. When
you roll a 20 on the d20 for an attack roll with
this weapon, the target is stunned until the end
of its next turn.