Ancestral Forge

"A workstation used to craft advanced weapons."

Overview
Merciless & Sanguine Weapons can be upgraded into Rare & Legendary weapons respectively at the Ancestral Forge. The stats of the weapon are derived from the ancestral shard used in the crafting process. Shard stats are always randomly generated.

All ancestral weapons are infused, causing Second Weapon Skill (Q) hits to inflict /  /  /  /  /.

Possible Stat Rolls
Rare and Legendary ancestral weapons have 2 and 3 random stat bonuses respectively. See the table below.

Perks

 * In Confined Castle Room: +25% speed.
 * Has Matching Floor (Forge Floor): -25% material cost.

Recipes
can be purchased at the Treasure Hunter Trade Post for each.

Rolling a Specific Legendary Ancestral Shard & Materials Required
Assuming all stat rolls are randomized, only 1/6 (16.67%) of weapon shards will contain a desired Magic School debuff.

Rolling for Specific Magic School + 1 x Specific Stat
Given that there are 11 possible stats, but we get 3 rolls to obtain our desired one, the overall chance to roll our desired stat on each attempt is $$1 - 10/11 * 9/10 * 8/9 ~= .27 (27%)$$.

Thus, the chance to roll a legendary shard with a specific magic school + a specific stat is $$1/6 * (1 - 10/11 * 9/10 * 8/9) ~= .045 (4.5%)$$, which is approximately 1 in 22 weapons.

Materials
Material costs for acquiring 22 random Legendary Weapon Shards by crafting 22 s and trading them at the Gloomrot Treasure Hunter:

Note that unused weapon shards can be salvaged for a small material cost recoup.