Valyrian Artifacts Mechanics

Valyria Expeditions
During the course of the game, your character or a member of your house can embark on an expedition to explore the ruins of Old Valyria. These ancient ruins hold many wonders, such as the rare and highly sought-after Valyrian Steel swords, even rarer Valyrian Steel armor, and even dragon eggs. However, be warned: not everyone survives the perilous journey, and even fewer make it back home to tell the tale. And beware of the Stone Men, victims of the deadly disease Greyscale, their minds ravaged with bloodlust from their affliction. However, if you're willing to risk it all, as well as fronting the costly journey, the possibility of riches lie ahead. The journey costs 1500 gold to embark on, and there must be 12 in-game months wait between journeys. Refer to the mechanics page for the necessary rolls. Just like all other rolls, these rolls  must  be done on the subreddit.

1-200 lost at sea, never arrive

201-500 don’t make it to Valyria, but you’re alive and you’re free to go back home

501-801 make it to Valyria, but you don’t find anything and there’s no way to to return back home

802-950 find nothing but can return back home

951-975 you find a Valyrian steel sword and can come home

976-980 find two thousand gold, can return home

981-995 you find valyrian steel armor, can return home

996-999 you find a dragon egg, can return home

1000 either 2 dormont dragon eggs or one possibly active dragon egg. (roll a 1d100 1-99 two dormont eggs, 100 one active egg. If it’s active you do another roll, you do a 1d20 1-13 won’t hatch, 14-20 it will.)

An unhatched active dragon egg is worth more than a dormont one.

If you make it to Valyria, you MUST do a greyscale roll. The greyscale roll is a 1d100 roll. 1-66 you get it, 67-100 you’re lucky

If you want to cure the greyscale you have three in game months to do so. You can either head straight to the citadel which is a 1d20 roll, 1-18 you’re cured 19-20 not cured.

Anywhere else in Westeros it’ll be a 1-8 cured, 9-20 not.

If you can’t make it to Westeros, your cure chances in Essos will rely on a 1d20 roll, 1-6 cured 7-20 not cured.

There will also be a roll for scarring. Do a 1d20 roll 1-13 scarring 14-20 not