He changed his name after Langris was named heir and Finral was freed from his familial responsibilities.
Rhya was still affected by the collective Elf Tribe reincarnation. That's why his hair color and tattoo changed during it.
The Evil Eye spell was an incomplete reincarnation; the second spell made it more complete.
According to Rhya, the requirements are undergoing two reincarnation spells and being reincarnated into a soulless body. Licht meets the latter requirement but not the former.
Licht is only reincarnated with the collective Elf Tribe spell, whereas Rhya, Vetto, and Fana have also been reincarnated with the Evil Eye spell.
According to Rades, Patolli is resurrected in Licht's artificial body because it was a copy made from Patolli/William's body.
All part of the magic.
The devil's power is Anti Magic. That is likely what gives the grimoire its purple/red glow.
They roughly correspond to the user's magic attribute.
It's unclear when the devil possessed David/Baval.
It's a rough gauge of the distance between caster and target. All three are mentioned in the first match of the tournament: the javelin-crossbow combo is a long-range spell, Asta is a close-range fighter, and the three-pronged pincer attack is three mid-range spells.
Since you tagged Mimosa's attack, I assume you're asking about its classification. Rick mentions that Mimosa and Asta moved into mid-range before she uses it, and if it were long-range, she wouldn't have needed to cross so much of the battlefield.
That is the spelling provided by the author.
Rhya mentions two requirements: twice reincarnated and a soulless body. Licht is reincarnated only once, while Rhya, Vetto, and Fana undergo the Evil Eye reincarnation and the second reincarnation.
Another thing to note is that Rhya isn't in an artificial body, like Vetto and Fana are. This suggests that he has been in that body long enough for his human host's soul to have passed on.
Who is Pali?
It's anime filler. Don't overthink it.
Gauche doesn't copy Anti Magic. He copies Asta and the swords, which channel Anti Magic from the devil in the connected grimoire.
Rhya is also capable of creating copies of the swords but he lacks the connection to the devil, so no Anti Magic for him.
Most of the nobles and royals who aren't captains have 4s.
Some are emotion-driven, like Noelle wanting to protect villagers so her magic becomes a shield.
Others are more strategic, like Gauche reworking his spells so he can duplicate Asta.
It is not out yet. The magazine is also on break due to Golden Week.
Langris has Spatial Magic. His partner would be a spirit of space.
Most likely Yami and Finral flew from the town into the caves, and Finral opened a portal for Yami to defend Asta. Licht and the Third Eye also don't notice the arrival of Jack, Nozel, and Charlotte.
Distance covered and size of portal factor into how much magic is required, as does Finral's fatigue. He didn't sleep much the night before traveling to Nairn and the caves, and there are children inside and outside of the caves that he needed to transport miles away. Finral's stamina improves as the series progresses and, during the fight with Vetto, Finral intentionally pushes past his limit and thoroughly exhausts himself.