Quote Originally Posted by Hiro Quester View Post
When you cast Steel Wind Strike the material component is a melee weapon worth at least 1sp, which you flourish as you "vanish to strike like the wind". You make a melee spell attack, though, and do 6d10 damage to each target you hit.

It's unclear whether you count as using that weapon to attack. For instance:

1. If you are using a +2 weapon, do you also add its +2 bonus to your attack rolls?

2. Do you also add your ability modifier and/or the weapon's enchantment +2 to the damage?

3. If it's a vicious weapon and you roll a critical hit, do you also add the weapons extra +7? If it's a flaming weapon, do you also add the d6 of fire damage?

4. If you have a spell like Spirit Shroud active, do you add the extra damage to each hit (at least to those targets within 10 ft as you cast SWS)?

5. If you have Greater Invisibility or Shadow of Moil active, do you also make those melee spell attacks with advantage?
1) No, because it's a spell attack, not a weapon attack. It would benefit from any bonuses to your spell attack though, such as if you had an Arcane Grimoire or a Staff of Power.
2) Also no, because it's a spell attack, not a weapon attack.
3) Irrelevant, the weapon doesn't actually matter outside of being a material component. So no.
4) You would, but only to anyone within 10ft of you when you cast SWS.
5) Yes, absent any other things like blindsight or whatnot.

Your DM may look to make adjustments to the above of course - for instance I'd let Spirit Shroud apply to all the SWS attacks, rather than just the ones who were within 10ft of you when you cast it.