Add support for Twisted Empyrean unique mods

spec/System/TestItemMods_spec.lua

@@ -220,4 +220,46 @@ describe("TetsItemMods", function()
 		assert.are_not.equals(120, build.calcsTab.mainOutput.Armour)
 		runCallback("OnFrame")
 	end)
+
+	it("twisted empyrean", function()
+		build.itemsTab:CreateDisplayItemFromRaw([[
+			Rarity: UNIQUE
+			Twisted Empyrean Test
+			Greatmace
+			Quality: 0
+			Sockets: S S S S
+			Rune: None
+			Rune: None
+			Rune: None
+			Rune: None
+			LevelReq: 52
+			Implicits: 0
+			Attacks with this Weapon have Added Cold Damage equal to 6% to 10% of Maximum Mana
+			Convert 100% of Fire Damage of Mace Skills to Cold Damage
+		]])
+		build.itemsTab:AddDisplayItem()
+		runCallback("OnFrame")
+
+		build.skillsTab:PasteSocketGroup("Leap Slam 20/0  1")
+		runCallback("OnFrame")
+
+		local baseColdAvg = round(build.calcsTab.mainOutput.ColdStoredCombinedAvg)
+
+		build.configTab.input.customMods = [[
+		+904 maximum mana
+		]]
+		build.configTab:BuildModList()
+		runCallback("OnFrame")
+		-- more mana increases average cold hit
+		assert.are_not.equals(baseColdAvg, round(build.calcsTab.mainOutput.ColdStoredCombinedAvg))
+
+		build.configTab.input.customMods = [[
+		100 to 200 added fire damage
+		]]
+		build.configTab:BuildModList()
+		runCallback("OnFrame")
+		-- added fire damage increases cold damage
+		assert.are_not.equals(baseColdAvg, round(build.calcsTab.mainOutput.ColdStoredCombinedAvg))
+		assert.equals(0, round(build.calcsTab.mainOutput.FireStoredCombinedAvg))
+	end)
 end)

src/Modules/ModParser.lua

@@ -3588,6 +3588,13 @@ local specialModList = {
 		mod("DamageGainAsCold", "BASE", num),
 		mod("DamageGainAsFire", "BASE", num),
 	} end,
+	["attacks with this weapon have added (%a+) damage equal to (%d+)%% to (%d+)%% of maximum (%a+)"] = function(_, damageType, min, max) return {
+		mod(firstToUpper(damageType).."Min", "BASE", 1, { type = "PercentStat", stat = "Mana", percent = min }, { type = "Condition", var = "{Hand}Attack" }, { type = "SkillType", skillType = SkillType.Attack }),
+		mod(firstToUpper(damageType).."Max", "BASE", 1, { type = "PercentStat", stat = "Mana", percent = max }, { type = "Condition", var = "{Hand}Attack" }, { type = "SkillType", skillType = SkillType.Attack }),
+	} end,
+	["convert (%d+)%% of (%a+) damage of (%a+) skills to (%a+) damage"] = function (num, _, fromDmg, skillType, toDmg) return {
+		mod(firstToUpper(fromDmg) .. "DamageConvertTo" .. firstToUpper(toDmg), "BASE", num, nil, ModFlag[firstToUpper(skillType)])
+	} end, -- Twisted Empyrean
 	["gain (%d+)%% of weapon physical damage as extra damage of an? r?a?n?d?o?m? ?element"] = function(num) return { mod("PhysicalDamageGainAsRandom", "BASE", num, nil, ModFlag.Weapon) } end,
 	["gain (%d+)%% of physical damage as extra damage of a random element"] = function(num) return { mod("PhysicalDamageGainAsRandom", "BASE", num ) } end,
 	["(%d+)%% chance for hits to deal (%d+)%% of physical damage as extra damage of a random element"] = function(num, _, physPercent) return { mod("PhysicalDamageGainAsRandom", "BASE", (num*physPercent/100) ) } end,