If Baron Zemo is defending against a physical attack, does he have to decide to pay the power to use the Master Swordsman:
1) after he is targeted but before he rolls his defense dice
Or
2) after he is targeted and after he rolls his defense dice
I ask because similar wording is on Hulkbuster's Built To Take It superpower: "When this character is targeted by an attack, it may use his power..."
They are both reactive powers but I was not sure when the player gets to choose to use it exactly.