If I commit 2 Hatchet Man+ Double or Nothing+ 1 Hatchet Man from another player, succeed, then I make a fight test with Machete/ Shriveling+ Double or nothing I will deal 16 damage on a success or 20 on one per game timeworn Brand effect?

Here's how it works:

1. You successfully evade an enemy with Hatchet Man x3 + Double or Nothing. This effectively triggers six successful uses of Hatchet Man, dealing +6 damage the next time the enemy is damaged.
2. You successfully attack that same enemy with a +1 damage weapon and Double or Nothing (not Machete, unless you're willing to spend an action re-engaging the evaded foe). This doubles the attack's damage, so the enemy takes 4 damage. Then, the ongoing Hatchet Man effect resolves, dealing 6 more damage, for a total of 10 damage.

You do not double Hatchet Man's damage with the second test's Double or Nothing. Hatchet Man does not increase the damage of the attack; it's an entirely separate damage-dealing effect that your attack happens to trigger.

3 minutes ago, rsdockery said:

Here's how it works:

1. You successfully evade an enemy with Hatchet Man x3 + Double or Nothing. This effectively triggers six successful uses of Hatchet Man, dealing +6 damage the next time the enemy is damaged.
2. You successfully attack that same enemy with a +1 damage weapon and Double or Nothing (not Machete, unless you're willing to spend an action re-engaging the evaded foe). This doubles the attack's damage, so the enemy takes 4 damage. Then, the ongoing Hatchet Man effect resolves, dealing 6 more damage, for a total of 10 damage.

You do not double Hatchet Man's damage with the second test's Double or Nothing. Hatchet Man does not increase the damage of the attack; it's an entirely separate damage-dealing effect that your attack happens to trigger.

I don't think that's correct. There's a developer response contradicting that here. On that basis, I believe the text "additional damage" on Hatchet Man means that it's rolled into the damage that triggers the lasting effect, so the damage caused by the attack itself is increased and therefore the increase is doubled.

24 minutes ago, Allonym said:

I don't think that's correct. There's a developer response contradicting that here. On that basis, I believe the text "additional damage" on Hatchet Man means that it's rolled into the damage that triggers the lasting effect, so the damage caused by the attack itself is increased and therefore the increase is doubled.

This is correct. A decent precedent for this is the ruling with Carolyn and Liquid Courage - her ability only triggers once, because the extra horror heal modifies the original, despite the test in between.

Edit: An effect that wouldn't get it would be worded something like Rex, where it's "After the enemy..."