Hmm, it's another of those spells that has a weird aura type effect.  I *think* the aura / area of effect only matters for the initial casting in determining what creatures of choice are affected, and that's probably how I'd rule for my own games BUT I'm so used to thing's being interpreted in the way that's least favorable to the players in this edition.

You're right. The initial radius is only for determining which creatures the caster can target.

Technically you could choose yourself because its anyone of your choosing within the radius initially including you but I'd rule it to the DM??

"Creatures of your choice in that radius when you cast this spell"

You are a creature, and inside the aura at the time of casting, so you can choose yourself no problem.

Also note the lack of repeating saves against the blind condition on subsequent turns, so as RAW if you're blinded by this spell then you're blinded until the spell ends. This is HUGE if you fight fiends or undead bosses.

I have a question what does it mean with holy-type magic what is holy type magic if used by a dawn dragon

Quote from flamesofdestrution >>

I have a question what does it mean with holy-type magic what is holy type magic if used by a dawn dragon

 Uuh... what?

I kinda see this spell as the cleric version of Foresight: it gives advantage to all saving throws and disadvantage to attack rolls against affects creatures. It is slightly weaker in that it only lasts for a minute and requires concentration, but given that it can affect an unlimited number of creatures in your range and can blind fiends or undead that do manage to hit the creature, I think it makes up for it.

Especially due to being able to affect an entire party if they’re within range - this might be my favorite defensive spell for that reason.

It's cool that this spell gives you advantage to maintain concentration on it

What's easy to overlook with this spell is that, unless you have the war caster feat, per the spellcasting rules, you'd have to be holding the reliquary in one hand and use your other hand free for the somatic components of the spell. So absent the war caster feat you couldn't be wearing a shield.

Since you can't use your shield in this case as the spellcasting focus (because the material component has a cost).

Not everyone takes war caster (some take resilient instead or don't even play using feats). So I figured I'd point this out. 

All clerics that are built reasonably well take res con and war caster.

Belated response but - you can use somatic components with the same hand you hold the material component in. So one hand is enough, leaving the other free for a shield.

It's a great spell. You can effect all your party, and familiars, and creatures that other casters has summoned for the whole fight even if they get far away from you laters.

Because it also affects attacks against you and your constitution saves it will be really hard to break your concentration.