D&D 5E Question on Illusory Dragon, Sickening Radiance, and Maddening Darkness spells

[ScuroNotte]

Illusory Dragon - As it is an illusion, if a creature has True Sight or immune to illusions, does it ignore the fear and damage completely or only gain advantage on saving throws as a creature who succeeds on an Investigation check as per the spell?

Sickening Radiance - The wording of the spell indicates that the creature only needs to make a saving throw when it enters the spells area the first time or starts in the area to avoid damage, exhaustion, and negation of invisibility benefits. Does that indicate that the creature can travel through the spells area without needing to make more saving throws to avoid taking any further damage or levels of exhaustion. Is that correct?

Maddening Darkness - It states that "light created by spells of 8th level or lower can't illuminate the area." But the Sunburst spell states that "This spell dispels any darkness in the area that was created by a spell." Which takes precedence.

 

[neogod22]

Illusory Dragon - As it is an illusion, if a creature has True Sight or immune to illusions, does it ignore the fear and damage completely or only gain advantage on saving throws as a creature who succeeds on an Investigation check as per the spell?

Sickening Radiance - The wording of the spell indicates that the creature only needs to make a saving throw when it enters the spells area the first time or starts in the area to avoid damage, exhaustion, and negation of invisibility benefits. Does that indicate that the creature can travel through the spells area without needing to make more saving throws to avoid taking any further damage or levels of exhaustion. Is that correct?

Maddening Darkness - It states that "light created by spells of 8th level or lower can't illuminate the area." But the Sunburst spell states that "This spell dispels any darkness in the area that was created by a spell." Which takes precedence.

For light and darkness spells, the higher level spell always wins.

 

[neogod22]

Since illusions do psychic damage based off of the belief it is real, someone with true sight will take no damage.

 

[ScuroNotte]

For light and darkness spells, the higher level spell always wins.

They are both 8th level spells

 

[neogod22]

They are both 8th level spells

The spell that's cast second, dispells the first one.

 

[ScuroNotte]

Since illusions do psychic damage based off of the belief it is real, someone with true sight will take no damage.

I agree. But the spell has a statement that if a creature succeeds in an investigation check to realize it is an illusion it gets advantage in its saving throws. So even if you know it's an illusion, you still take damage.
But if you are immune to illusions or true sight, does the creature negate all the harmful effects?

 

[neogod22]

I agree. But the spell has a statement that if a creature succeeds in an investigation check to realize it is an illusion it gets advantage in its saving throws. So even if you know it's an illusion, you still take damage

The difference is, just doing an investigation still leaves doubt. You know it's not real, but you still believe it to be real. Kind of like a nightmare, you know you're dreaming, but the fear of death is still real to your mind.

 

[neogod22]

Sickening radiance and other spells like that are worded, in a way that indicates that the creature can only take damage once a turn. So if it can travel through it and get out in the same turn, then it only has to make 1 save. If for whatever reason they stop in it, they will have to make a save again at the start of their next turn

 

[gyor]

Since illusions do psychic damage based off of the belief it is real, someone with true sight will take no damage.

its only partly an illusion, the other part is shadow stuff, so it doesn't deal psychic damage at all, you can chose from fire, cold, lightning, poison, acid, and necrotic so with true sight you know its this giant dragon shaped blob of darkness, but it keeps spitting damaging shadowfell stuff at you anyways that burns, freezes, zaps, melts, sickens, or rots you depending upon your choice of damage. its really should be called Partially Illusion/Partially Real Shadowfell Stuff Dragon, but that doesn't flow off the tongue like Illusionary Dragon. its a weird spell, but one of my favourites. Because its semireal it can even be targeted, although it auto suceeds on saves (but buff spells don't require saves).

 

[jaelis]

Maddening Darkness - It states that "light created by spells of 8th level or lower can't illuminate the area." But the Sunburst spell states that "This spell dispels any darkness in the area that was created by a spell." Which takes precedence.

There's no real conflict here. If you cast sunburst in an area of maddening darkness, the darkness is dispelled, but the area where the darkness was is not illuminated. Since sunburst is instantaneous, there's no inconsistency; picture the darkness as stopping the light but then being dispelled in the process.

A question that might require a ruling would be whether a creature originally in the darkness suffers the effects of the sunburst spell. I would play that it does not, since sunburst only effects creatures in the light from the spell.