The deadly weapon trait in the SF2 playtest is using a different scaling than the deadly trait in PF2.
On a critical hit, the weapon adds a weapon damage die of the listed size. Roll this after doubling the weapon’s damage. This increases to two dice if the weapon has a greater striking rune and three dice if the weapon has a major striking rune. For instance, a rapier with a greater striking rune deals 2d8 extra piercing damage on a critical hit. An ability that changes the size of the weapon’s normal damage dice doesn’t change the size of its deadly die.
On a critical hit, the weapon adds an additional weapon damage die of the listed size. Roll this after doubling the weapon’s damage. The damage from this trait increases for each damage dice the weapon has. For instance, an advanced nano-edge rapier deals an additional 2d8 piercing damage on a critical hit. An ability that changes the size of the weapon’s normal damage dice doesn’t change the size of its deadly die.
PF2 scaling: 1d8 -> 1d8 -> 2d8 -> 3d8
SF2 scaling: 1d8 -> 2d8 -> 3d8 -> 4d8I am not sure if this is an intentional change or if something got tangled up.
Oh crap I should have noticed this.