Yucalibur

Melee weapon (artifact, club)
Category: Minor Artifact
Damage: 1d8(elder) + Str + 3
Item Rarity: Artifact (requires attunement by a
Druid or a follower of Brassica Prime)
Properties: 2H
Weight: 10
On a hit, you deal 1d4(poison) x Prof. If the
damage is resisted or negated, you heal the
amount of damage that wasn't dealt.