pf2e.fyi
From Pathfinder #181: Zombie Feast, which isn't enabled.

Bone Shard Tough

CREATURE 0
Perception +6
Languages Common
Skills Acrobatics +5, Athletics +5, Graydirge Lore +4, Stealth +5
Str +1, Dex +3, Con +2, Int +0, Wis +2, Cha +0
Items Bone Shard (3), Leather Armor, Lantern (Hooded)

AC 15; Fort +6, Ref +7, Will +4
HP 20

Speed 25 feet
Melee Bone Shard +8 (finesse), Damage 1d6+2 piercing
Melee Bone Shard +8 (thrown 20), Damage 1d6+2 piercing
Puncture (attack)
Requirements The tough has two bone shards in hand

Effect The tough attempts to use one shard of bone to hammer another into a creature, creating a gaping wound. The tough attempts an Athletics check against the target's Reflex DC. On a hit, the target takes the listed bone shard damage and 1d4 bleed.
Pathfinder #181: Zombie FeastOGL