Improved Pact Weapon and magic weapons...

[samcifer]

Can the Improved Pact Weapon eldritch evocation let you add the bonus of a magic weapon to attack and damage rolls if you use it as your implement, say if you have a +2 weapon?

[LeonBH]

Yes, since you can bond to a magic weapon as your pact weapon.

But, you can't get a total +3 bonus by attuning to a +2 weapon. The Improved Pact Weapon bonus doesn't stack with the magic weapon, it's replaced.

[samcifer]

Yes, since you can bond to a magic weapon as your pact weapon.

But, you can't get a total +3 bonus by attuning to a +2 weapon. The Improved Pact Weapon bonus doesn't stack with the magic weapon, it's replaced.

so it would become +2 instead of the +1 from the evocation. got it. thanks.

[Vaz]

so it would become +2 instead of the +1 from the evocation. got it. thanks.

Thats literally the opposite of what was said.

[JackPhoenix]

You mean attack and damage rolls with spells? No. And, as LeonBH said, if the magic weapon already has +x, it doesn't stack.

[samcifer]

You mean attack and damage rolls with spells? No. And, as LeonBH said, if the magic weapon already has +x, it doesn't stack.

so it's only a +1 no matter what? no point in taking it then. :(

[LeonBH]

so it's only a +1 no matter what? no point in taking it then. :(

No, your first interpretation is correct. If you attune to a +2 magic weapon, your pact weapon becomes a +2 magic weapon.

"In addition, the weapon gains a +1 bonus to its attack and damage rolls, unless it is a magic weapon that already has a bonus to those rolls."

It doesn't stack in the sense that you will lose the +1 of the invocation.

Another benefit of it is you don't need War Caster anymore (if the main draw of it for you was casting with a shield in hand, not the advantage to Conc saves or casting spells as a reaction). Since it turns your pact weapon into a spellcasting focus, and since you can perform the somatic components of a spell with the same hand you're holding your material components, then this invocation handles the S,M components of spellcasting for you without needing to drop the weapon or take War Caster.

[samcifer]

No, your first interpretation is correct. If you attune to a +2 magic weapon, your pact weapon becomes a +2 magic weapon.

"In addition, the weapon gains a +1 bonus to its attack and damage rolls, unless it is a magic weapon that already has a bonus to those rolls."

It doesn't stack in the sense that you will lose the +1 of the invocation.

Another benefit of it is you don't need War Caster anymore (if the main draw of it for you was casting with a shield in hand, not the advantage to Con saves or casting spells as a bonus action). Since it turns your pact weapon into a spellcasting focus, and since you can perform the somatic components of a spell with the same hand you're holding your material components, then this invocation handles the S,M components of spellcasting for you without needing to drop the weapon or take War Caster.

nice. thanks for the answer. :)

[PeteNutButter]

I would add that it works excellently with magic weapons that aren’t +x weapons. I use a flame tongue longsword with it. Since it doesn’t already have a +1, it becomes a +1 Flame Tongue.

[swamp_slug]

Another benefit of it is you don't need War Caster anymore (if the main draw of it for you was casting with a shield in hand, not the advantage to Conc saves or casting spells as a reaction). Since it turns your pact weapon into a spellcasting focus, and since you can perform the somatic components of a spell with the same hand you're holding your material components, then this invocation handles the S,M components of spellcasting for you without needing to drop the weapon or take War Caster.

That is only true if the spell has both an S and an M component (which is not consumed and does not have a gp cost) since the spellcasting focus substitutes for the M component and you can use the hand that manipulates the M component to do the S component. If the spell you are casting does not have an M component (like Eldritch Blast) then you will either need a free hand or the War Caster feat.

While the +1 from the invocation won't stack with the +x from a magic weapon, it will apply to any magic weapon that does not have a +x bonus like a Flame Tongue, a Frost Brand or a Vicious Weapon.

[samcifer]

That is only true if the spell has both an S and an M component (which is not consumed and does not have a gp cost) since the spellcasting focus substitutes for the M component and you can use the hand that manipulates the M component to do the S component. If the spell you are casting does not have an M component (like Eldritch Blast) then you will either need a free hand or the War Caster feat.

While the +1 from the invocation won't stack with the +x from a magic weapon, it will apply to any magic weapon that does not have a +x bonus like a Flame Tongue, a Frost Brand or a Vicious Weapon.

My dm waives the material component costs for spells, so that's not an issue in my group. The only thing lost from not taking War Caster is not having advantage on CON saves to preserve concentration on a spell.

[rbstr]

Wait wait wait.

Can the Improved Pact Weapon eldritch evocation let you add the bonus of a magic weapon to attack and damage rolls if you use it as your implement, say if you have a +2 weapon?

When you say "implement" it sounds like you're talking about giving your spells a bonus to attack and damage. You pact weapon doesn't ever do that (unless you bond to a Rod of the Pact Keeper or some other weapon that explicitly says it has a bonus to spell attacks, I guess).
5e doesn't have "implements".

But, otherwise, yeah. The +1 part of Improved Pact Weapon doesn't stack with +X the weapon may have.