You could do this as an attacher, but it might be more appropriate added to the Freetext or Freeform for that particular weapon's attack. The thing with attachers is that they are applied to whole categories of actions. Attachers make sense for something that Sneak Attack, as it can apply to any of your attacks. For Vicious Weapon, unless all your weapons are Vicious, it's better to put it on only the weapon that is. If you want to do it as an attacher: On the Gear tab of the sheet at the bottom, add an attacher, name it Vicious Weapons. Under MISC, check the Offensive line. Add the appropriate text in either the Freetext or Freeform sections. Freetext is just something you'd type in the chat, like: *Vicious:* [[2d6]] extra damage on a [[20]]. For Freeform, it's a collection of rows to add to the end of the Roll Template. You can use this to either add additional entries in the Roll Template, or to run API commands, or just output stuff like the above outside the Roll Template. (Note: for API commands to work, you need to hit enter once before them so they start at the beginning of a line other than the first one.) I usually put things in the text_center tag: {{text_center=*Vicious:* [[2d6]] extra damage on a [[20]].}} If you have multiple things, you'd need to put them all in the same {{text_center= }} block. One thing to be aware of with uses of Roll Template tags will override prior ones. So if you have several attachers that all apply, only the last one will actually show up. If you want to do it tied to the weapon: First, on the gear tab, make sure you have Freetext and/or Freeform turned on in the Actions section (third block down in the second column). Now, when you edit an attack it will have the additional fields just like an attacher does. Use whatever formatting you like from the above only directly on the weapon.
