Can a kensei/swashbuckler use an offhand finesse weapon to trigger sneak attack, without using a bonus action?


Context

For a relatively new campaign I’ve built a kensei (monk). At level 7, 8 and 9 (we’re level 4 now) I’m planning on taking three levels in swashbuckler (rogue). Now I’m exploring my options for triggering Sneak Attack with this character, in melee.

My character’s Kensei Weapons are a longsword and longbow. So with this multiclass idea I won’t be able to trigger Sneak Attack with the trusty longsword, or with my Unarmed Strikes, because Sneak Attack states:

Once per turn, you can deal an extra 1d6 damage to one creature you hit with an attack if you have advantage on the attack roll. The attack must use a finesse or a ranged weapon.

You don’t need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll.

Combat situation

When engaged in melee combat, my game plan is to wield a longsword in my main hand and a finesse weapon (dagger) in my off-hand, while still having the rest of my body ready for making Unarmed Strikes (knees, elbows, kicks, headbutts, etc). When the circumstances are right for making a Sneak Attack, I would like to strike with the dagger, without the need for swapping weapons and without taking a bonus action.

Question

My goal is to use my usual attack and damage roll for the dagger when I declare the off-hand weapon attack during my Attack action or Reaction. I would be wielding my longsword too, but not necessarily attack with it on the same turn. Would this work by RAW? Or would I be needing to have the dagger in my main hand for this?

I’m new to the workings of Two Weapon Fighting, so I might be overlooking something here.


Related:

  • Rogue using Dual Wield and Sneak Attack

If a Hexblade is using a sentient weapon, can they stack the weapons charisma stat with their own for attack and damage rolls?

So I’ve been working on a Half-Elf Hexblade for a bit now and decided he should have a moonblade, which is a sentient elven longsword. Sentient weapons can’t be pact weapons, but you can still choose to use charisma with them using hex warrior. Does the weapons own charisma stat then stack with yours for attack and damage rolls?

Can a creature with a natural weapon that has reach make an attack through the Antilife Shell spell?

The Antilife Shell spell states:

An affected creature can cast spells or make attacks with ranged or reach weapons through the barrier.

This suggests that a human could attack with a glaive, since the weapon can reach the full 10 feet through the shell and strike the caster.

Does this include monsters whose natural weapons have a reach of 10 feet or greater? For example, a dragon’s tail attack which has a 15-foot reach or a T-Rex’s bite which has a 10-foot reach.

When does the attacker choose the damage type dealt by a weapon with multiple damage options?

Take a longsword, for example. Does the attacker choose piercing or slashing before they make the attack roll, after the attack roll is made but before the damage roll, before they make the damage roll, or even as the last part of the attack, after all the numbers are said and done?

Is the homebrew weapon attack cantrip ‘Arcane Strike’ balanced?

I have created some new cantrips which include making a weapon attack as there are only two official ones to choose from. I’ve tried to follow these principles based on Booming Blade and Green-Flame Blade:

  • Melee weapon attack only, 5 foot range
  • No unavoidable extra damage to the primary target at level 1
  • Damage no more than 2 targets
  • Spellcasting ability modifier doesn’t have to affect the spell at all
  • Only available on the Warlock, Sorcerer and Wizard spell lists

But with such a small amount of official content to compare them against, it’s hard to say if they’re balanced.

Is this spell balanced with Booming Blade and Green-Flame Blade?

Arcane Strike

Evocation cantrip

Casting Time: 1 action
Range: 5 feet
Components: V, M (a weapon)
Duration: Instantaneous

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails.

On a hit, the target suffers the attack’s normal effects, except all bludgeoning, piercing and slashing damage from the attack is converted to force damage.

At 5th level, the attack deals an extra 1d6 force damage to the target. The damage roll increases by 1d6 at 11th level and 17th level.

Is the homebrew weapon attack cantrip ‘Astral Smash’ balanced?

I have created some new cantrips which include making a weapon attack as there are only two official ones to choose from. I’ve tried to follow these principles based on Booming Blade and Green-Flame Blade:

  • Melee weapon attack only, 5 foot range
  • No unavoidable extra damage to the primary target at level 1
  • Damage no more than 2 targets
  • Spellcasting ability modifier doesn’t have to affect the spell at all
  • Only available on the Warlock, Sorcerer and Wizard spell lists

But with such a small amount of official content to compare them against, it’s hard to say if they’re balanced.

Is this spell balanced with Booming Blade and Green-Flame Blade?

Astral Smash

Evocation cantrip

Casting Time: 1 action
Range: 5 feet
Components: V, M (a weapon)
Duration: 1 round

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails.

On a hit, the target suffers the attack’s normal effects, and it becomes outlined in sparkling light until the end of your next turn. While outlined, it sheds dim light in a 5-foot radius and cannot benefit from being invisible.

At 5th level, the attack deals an extra 1d6 radiant damage to the target. The damage roll increases by 1d6 at 11th level and 17th level.

Is the homebrew weapon attack cantrip ‘Battery’ balanced?

I have created some new cantrips which include making a weapon attack as there are only two official ones to choose from. I’ve tried to follow these principles based on Booming Blade and Green-Flame Blade:

  • Melee weapon attack only, 5 foot range
  • No unavoidable extra damage to the primary target at level 1
  • Damage no more than 2 targets
  • Spellcasting ability modifier doesn’t have to affect the spell at all
  • Only available on the Warlock, Sorcerer and Wizard spell lists

But with such a small amount of official content to compare them against, it’s hard to say if they’re balanced.

Is this spell balanced with Booming Blade and Green-Flame Blade?

Battery

Evocation cantrip

Casting Time: 1 action
Range: 5 feet
Components: V, M (a weapon)
Duration: 1 round

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails.

On a hit, the target suffers the attack’s normal effects, and you become charged until the end of your next turn. While charged, you deal an extra 1d8 lightning damage when making a melee attack with a weapon. If you become charged while you are already charged, the charged damage increases by 1d8, up to a maximum of 2d8.

At 5th level, the attack deals an extra 1d8 lightning damage to the target and the maximum charged damage increases by 1d8. The damage roll and maximum charged damage increase by 1d8 at 11th level and 17th level.

Is the homebrew weapon attack cantrip ‘Blade of Hate’ balanced?

I have created some new cantrips which include making a weapon attack as there are only two official ones to choose from. I’ve tried to follow these principles based on Booming Blade and Green-Flame Blade:

  • Melee weapon attack only, 5 foot range
  • No unavoidable extra damage to the primary target at level 1
  • Damage no more than 2 targets
  • Spellcasting ability modifier doesn’t have to affect the spell at all
  • Only available on the Warlock, Sorcerer and Wizard spell lists

But with such a small amount of official content to compare them against, it’s hard to say if they’re balanced.

Is this spell balanced with Booming Blade and Green-Flame Blade?

Blade of Hate

Enchantment cantrip

Casting Time: 1 action
Range: 5 feet
Components: V, M (a weapon)
Duration: 1 round

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails.

On a hit, the target suffers the attack’s normal effects, and it must make a Wisdom saving throw or become afflicted with an irrational hatred of you until the start your next turn. On its turn, it must use its action to attack you or include you as a target of or in the area of a hostile ability if it can. (Other targets may be chosen as well as you if applicable). Undead and creatures immune to being Charmed aren’t affected by this effect.

At 5th level, the attack deals an extra 1d6 psychic damage to the target. The damage roll increases by 1d6 at 11th level and 17th level.