| Thaumascourge |
You assess a foe's weaknesses in combat and use them to formulate a plan of attack. Choose a creature you can see. You can Devise a Stratagem as a free action if you're aware that creature could help answer the question at the heart of one of your active investigations. Roll a d20, then decide on an attack stratagem or skill stratagem.
"Attack Stratagem: If you Strike the chosen creature before the start of your next turn, your Strike gains the fortune trait and you must use the result of the d20 roll for your Strike's attack roll instead of rolling. You make this substitution only for the first Strike you make against the creature this round, not any subsequent ones. When you make this substitution, you can add your Intelligence modifier to your attack roll instead of your Strength or Dexterity modifier. If you Strike with a melee weapon, melee unarmed attack, or thrown weapon, it must have the agile or finesse trait to benefit from the substitution."
If my Investigator (or a PC with an Investigator Archetype and Devise a Stratagem) were to get an out of turn Reaction that grants me a Strike, it seems like I would have to use the result of the d20 roll gained from Devise a Stratagem on the out of turn Reaction.
But what happens if I use a melee weapon without the finesse or agile traits? Would I still be required to use the substituted d20 roll, even if I cannot benefit from the substitution?