I created a College of Swords Bard / Hexblade Warlock multiclass character. Warlock allows me to use my CHA (+4) modifier instead of my DEX (+2) for melee attacks. The bard subclass is also proficient with longswords, so I would expect my proficiency bonus (+3) to be added for a total of +7 on my hit/dc value. Instead, the longsword only shows +4, which indicates a bug for me. Did I get something wrong here?

Edit: Even if I remove the Warlock subclass, my Longsword hit/dc is only at my DEX (+2) modifier, completely ignoring proficiency bonus.

Please assist.

Longswords use STR, not DEX. What's your strength mod? Also, for the Hexblade weapon, have you marked it as a pact weapon?

No I haven't, it's supposed to be just a normal weapon... but then I don't get it at all, since my strength modifier is only +1.

Can the Warlock only use the charisma modifier on his pact weapon attacks?

Also, how do I mark a weapon as pact weapon, and how many Warlock levels do I need for this? (If it is required to use charisma to attack instead of strength)

But when I use the charisma modifier to attack with my pact weapon, the proficiency bonus in longswords should be added, is that correct?

Hello there athi_li,

If you tap/click on the longsword, a side menu should pop out with a “Hex Weapon” tickbox. Click on it, and the sheet should start using CHA. Once your Warlock is at level 3 (and has chosen Pact of the Blade), you will then be able to also select the “Pact Weapon” option.

Thanks, I finally found the same tip through another thread and now it works fine.

You might want to add that this option is only available on the webpage and NOT from the mobile app, that's why I couldn't find it ;)