Quote Originally Posted by Astralia View Post
--> Reapers use avatars from the void, that is the 13th shard, but what would happen to their powers and ability to call their avatar if, as the msq seems to hint it atm, we were to clear the 13th shard from its darkness as we've done it with the 1st shard with its light flood ?
Chances are the voidsent themselves would still remain, but that would depend on what theoretical method we'd even be using, but like Sidurgu said, we ain't gonna do that instantly. If we zero down into the specific question of 'what would happen if you specifically de-Voidsented a Reaper's Avatar', that may also not be possible if the rules we know about tempering hold true for voidsent as well, but I'd wager it would break the bond, just looking at Zero.

--> In the same way a Reaper is able to call an avatar from the void, as an alternative, would a reaper be able to tame and call a sin-eater from the 1st? (or by extension, any other aetheric entity from any other shard, or even aetheric entities from the primitive world, like the elementals for example)
That's in the Air Bud realm of 'there's no rule saying they can't', but there would be other logistical issues. The Void is 100% full of Voidsent, so there's not really difficulty fishing for one; that isn't true of the First and Sin Eaters, and not to mention there's much less reliable way of cracking open a gate there. So while that's certainly plausible, I imagine it's less reliable as a practice. You also have to keep in mind that thanks to the timestream weirdness, the First wasn't actually a meaningful source of Sin Eaters for very long at all by the Source's clock, so this theoretical Sin Eater Reaper would basically have had to come up with this technique during, like... exactly Stormblood. (Granted, Stormblood is the longest expansion going by 'time said to have elapsed', they've got time.)

--> That brings my last question: as hinted in my 1st question, do all the sin-eaters disappeared when we cleared the 1st from its light or do some of them would be able to survive even after we parted from the 1st?
Again, as Sidurgu mentioned, it's more that there's no longer a naturally replenishing source of sin eaters. They're still around, and we both fight them (in the role quests) and hear of them fought (it comes up in 5.3), they're just eventually going to die out, and unlike voidsent they don't have the ability to come back afterwards. So right now, this strategy would work; eventually, it won't.