How do I accommodate a blind player at my remote table?

For remote play at our table, we use a camera stuck on a microphone-boom-arm that we can rotate by 360°. We found out that we prefer it to have our rest position at about 45°, instead of top-down because the top-down angle creates nausea for some of our players, and it simulates sitting at a table. We use a 19 by 19 go-board with numbered and lettered tiles to make calls based on a grid for combat encounters and other visualisation when appropriate. For indicating features, we use a mix of miniatures that were part of the 2002 D&D boardgame by Hasbro and cardboard printouts that create terrain objects by sliding them together at a 90° angle with little plastic sockets, so they don’t topple over.

I designed our base set-up for remote play to feign an in-person feeling by visualisation.

I will have a remote guest player for three sessions who is blind, and I’m looking for preparations and ways to accommodate them and make our set-up as accessible as reasonable. What can I do to optimise the experience for them in particular, and so in turn for all of us?

With Blind Fighting style from Tasha’s Cauldron Of Everything, can you cast spells that require a target you can see?

Blind Fighting, as phrased in Tasha’s Cauldron Of Everything, contains additional wording beyond the description of mere Blindsight. The entry for Blind Fighting reads:

You have blindsight with a range of 10 feet. Within that range, you can effectively see anything that isn’t behind total cover, even if you’re blinded or in darkness. Moreover, you can see an invisible creature within that range, unless the creature successfully hides from you.

Using the optional Class Features for the Fighter class which are presented in TCoE, this Blind Fighting fighting style offers not only 10ft of Blindsight, but the wording above, which by my reading at least heavily implies that you should be able to cast spells which target a space, object, or creature "you can see", within the 10ft range of this ability.

You can explicitly "see an invisible creature", but does "you can effectively see anything that isn’t behind total cover" mean that you can cast sighted spells on targets within that 10ft range?

Would being blind reduce a character’s speed?

A PC is under the effect of a Suggest spell and told to follow someone who had darkvision. The PC, who is under the effect, doesn’t have darkvision, and they are led into a tunnel system that is pitch black. How fast are they able to move?

I can’t find anything RAW which states that trying to move in darkness has any detrimental effects, other than the obvious statement of not being able to actually see where they are going.

Can continual flame be cast on an opponents helmet to blind them?

The Spell Continual Flame(p227 of the Player’s handbook) Is a touch spell. It does not offer any parameters as to what qualifies as a target other than it has to be an object. In theory you could touch an opponents helmet and a flame would spring forth. Potentially blinding him. (With no save and no attack roll).

Where as the light cantrip (p255 of the Player’s handbook) Specifically states:

If you target an object held or worn by a hostile creature, that creature must succeed on a Dexterity saving throw to avoid the spell.

This leads me to believe the spell is working as intended.

Is there a rule or ruling that I am missing?

Can you use a Wall of Sand to blind a creature without obscuring it?

Recently, I was taking a look through the Wizard spell list, and the Wall of Sand spell sparked my interest:

You conjure up a wall of swirling sand on the ground at a point you can see within range. You can make the wall up to 30 feet long, 10 feet high, and 10 feet thick, and it vanishes when the spell ends. It blocks line of sight but not movement. A creature is blinded while in the wall’s space and must spend 3 feet of movement for every 1 foot it moves there.

Blinded is a relatively powerful condition, and applying it without a save seems very strong. However, the Wall of Sand spell also blocks line of sight. If a creature also becomes heavily obscured by the wall, it would negate many of the benefits of applying the blinded condition. Can the Wall of Sand spell blind a creature without obscuring it, under the Variant: Playing on a Grid rule?

Blind Familiar trying to deliver a touch spell

Here’s the setup:

  • My familiar is adjacent to a target. My familiar is blinded.

  • I cast a touch spell. My familiar uses its reaction to deliver the spell.

Normally, being blinded causes you to attack at disadvantage, so I attack at disadvantage, right? I’m nearly certain about this, but wanted to confirm.

Background reading:

Casting while blinded in D&D 5e (mentions casting while blind, but not specifically the issue of a familiar delivering a touch spell)

Blinded + casting a spell with a bonus action + Find Familiar

Does an invisible familiar delivering a touch spell have advantage?