Quote from Buddha75 >>

here's my question..... 

"When you cast this spell, you can designate creatures to be unaffected by it"....... so if my rogue decides to use stealth on his turn and rolls 27 to hide. No one in the group sees him. The Cleric then decides to cast Spirit Guardians, but has no idea where the rogue is, can he still designate to rogue to not be affected by Spirit Guardians? 

2014 rules specified must see. Now it only says you can designate creatures to be unaffected by it. I would think you would need to see him. Or at least shout out to the rogue,: " wherever you are dont enter my aura" LOL. 

It doesn't say you need to be able to see them, so you don't need to be able to see them.

Just change it to:  "The creature only takes damage from this spell once per round."

Quote from sethtucker1 >>

Just change it to:  "The creature only takes damage from this spell once per round."

That would significantly weaken the spell.

Quote from wagnarokkr >>

Quote from sethtucker1 >>

Just change it to:  "The creature only takes damage from this spell once per round."

That would significantly weaken the spell.

 I think going from completely broken to very strong is fine.

Quote from EdwardDolan >>

That's true. 

The exploit comes from the phrase "they only make this save once per turn." On another party member's turn or on their turn they can take damage again. So you can play rugby with the cleric and cause the damage multiple times per ROUND.

No, you can't.

People need to stop being dumb. Really. Its like you are intentionally trying to mis-interpret the rules. I guess it's an american thing.

RAI over RAW. Always.

This game takes place in worlds where time mimic our own. This is no problem outside of combat. But in combat, we have to assort to turns, even though everything in a round is happening at the same time. 

Being inside the aura of spirit guardians hurt. Here, you are trying to argue that spending less time inside a damaging aura hurts more. Which is totally counterintuitive. Why would enduring the full round inside the harmful aura hurt you less, rewarding you with only one damage roll, compared to the enemy who is in and out of the aura?

Would you rather have your fist inside a boiling pot of water for 6 seconds straight, or would you prefer dabbing in and out?

The enemy rolls for damage once per round. 

Quote from wagnarokkr >>

Quote from sethtucker1 >>

Just change it to:  "The creature only takes damage from this spell once per round."

That would significantly weaken the spell.

 No, it would not. This is still one of the most powerful spells in the game.