Drow

In-game description:
"The Drows believe that any crime can go unpunished if nobody notices you did it. They value and praise perfect executions, and will reward those who plan accordingly."

The Drow Faction

Drow were implemented during the Underworld expansion (v1.2). It is the Evil Prestige Faction, and will only appear when playing an Evil Vanilla faction. The Drow player will be able to combine the 2 faction spells and all the 18 upgrades and from both the Evil Vanilla and Drow factions. Several of their upgrades rely on Royal Exchanges and it is suggested to combine with the faction-coin-heavy Goblin Faction (forming something popularly referred to as "Droblins").

• Alignment: Prestige (Evil)
• Faction Spell: Combo Strike - Increase the production of all buildings. The more spell casts, the more production is increased. See table of increase/casts.
  Formula: $30\times x^{0.9}\%$  where x is your Combo Strike casts (This game) stat.
• Spell Upgrade: Perfect Combo - Increases Combo Strike bonus.
  Formula: $40\times x^{0.9}\%$  where x is your Combo Strike casts (This game) stat.
  • Unlock requirement: Cast Combo Strike 100 times in a row.
• Heritage: Increase the production of assistants based on the amount of Royal Exchanges you purchased in this game.
  Formula: $2 \times x^{0.8}$  where x is your your Royal Exchanges made (This Game) stat.
• Bloodline: Multiplicatively increase the chance to find Faction Coins based on time spent in this game.
  Formula: $1.6 \times x^{0.6}$  where x is your time spent (this game) stat.
• Challenge Reward: Versatile Combo - Increase Combo Strike counter based on the amount of spells cast in this game, excluding Tax Collection.
  Formula: $10 \times \log_{10}(1 + (y \times 30)) + x$  where x is Combo Strike casts (This game) and y is every other spell's (except TC) casts (This game).
• Unique Building: Spider Sanctuary (from Dark Temples)
• Research Facilities: Spellcraft, Alchemy, Warfare
• Faction Unlock Requirements: See below

Tier 1 Upgrades

Name		Cost	Effect
	Drow Trade Treaty	3000 Drow Coins	Unlocks Drow Upgrades.
	Underworld Tyranny	5 Qad 5E45	Increase the production of all buildings based on your time spent being Evil in this Reincarnation. Formula: $(0.7\times x)^{0.7}\%$  where x is your Time Spent Being Evil this Reincarnation stat in second.
	Honor Among Killers	50 Qad 5E46	Additively increase Faction Coin find chance based on the amount of assistants you own. Formula: $+(100+0.5\times {\sqrt {x}})\%$  where x is your Assistants stat.
	Shadow Advance	500 Qad 5E47	Increase the production of all buildings based on Max Mana. Formula: $(2\times \log _{10}(1+x)^{2})\%$ where x is your Max Mana.

Tier 2 Upgrades

Name		Cost	Effect
	Drow Friendship Pact	12000 Drow Coins	Unlocks more Drow Upgrades.
	Mana Addicts	50 Qid 5E49	Mana regeneration increases over time. Formula: $+(2.5 + 0.25 \times x ^{0.5})$  where x is your Play Time (This Game) stat in seconds.
	Blood Sacrifices	500 Qid 5E50	Increase the production of all buildings based on the highest amount of Dark Temples you built in this Reincarnation. Formula: $(3\times x)\%$ where x is the highest amount of Dark Temples you built in this Reincarnation.
	Blackmail	5 Sxd 5E51	Reduce the cost multiplier for Royal Exchanges. Reduces cost multiplier by 0.02; with no other reductions applying, the multiplier will be 1.08 instead of 1.1.

Tier 3 Upgrades

Name		Cost	Effect
	Drow Alliance	30000 Drow Coins	Unlocks more Drow Upgrades.
	Spider Gods	500 Sxd 5E53	Multiplicatively increase assistants based on the amount of buildings you own. Formula: $(0.5\times {\sqrt {x}})\%$ where x is the amount of buildings you own.
	Professional Assassins	5 Spd 5E54	Multiplicatively increase production bonus from Gems based on the amount of Royal Exchanges you made. Formula: $(0.6\times x^{0.6})\%$ where x is the amount of royal exchange made.
	Blade Dance	50 Spd 5E55	Increase the production of all buildings based on the Combo Strike counter in this game. Formula: $(100+80\times x^{0.4})\%$  where x is your current Combo Strike bonus.

Faction Unlock Requirements

Below requirements can be done in separate game plays.

Drow Faction Unlock Requirements
Name		Cost	Description	Requirement
	Passage to the Underworld	50 Qid 5E49	Unlocks Prestige Quests Required once throughout the entire game play and does not count towards the bought upgrade stat.	200 Excavations
	Cloaked Shady Figure's Quest	10 Qad (1E46), 10K Goblin, Undead and Demon Coins	Unlocks Underworld Diplomacy Required once throughout the entire game play and does not count towards the bought upgrade stat.	Evil Alignment, Build 650 Dark Temples, Have 325 trophies, 10,000 Spells cast (Total)
	Underworld Diplomacy	1 Qad 1E45	Unlocks Prestige Faction Coins, Trade Treaty, Royal Exchanges and Heritage Required each run until R3	Cloaked Shady Figure's Quest

Drow Unique Building

At R28, Drow's Dark Temples can be upgraded to a Unique Building: Spider Sanctuary, which is required for some challenges and research quests.

Drow Research

Upon reaching R29, the game advisor tells us that the Prestige factions have discovered an almost infinite source of magical power: Prestige Research.

Drow Research enables you to combine both unique buildings and researches from both the Vanilla and Drow factions.

Each item below can be unlocked in separate game plays, and most only need to be bought once throughout the entire game play. The Unique building upgrade and the Dark Light of Bondelnar are the only ones that need to be bought each run and count towards the 'Bought Upgrades' stats.

Drow Research Unlock Requirements
Name		Type	Description	Requirement	Cost
	Spider Sanctuary Quest	Quest Upgrade	Kivvil. Our Valsharess requires more places to worship the almighty Spider Queen. Build enough Dark Temples, and our priestesses will consecrate them.	R28+, 2000 Dark Temples	10 Sxg 1E184
	Spider Sanctuary	Allegiances Upgrades	Upgrade Dark Temples to Spider Sanctuaries, boosting their production based on time spent offline and unlocking more unique perks for the building. Formula: $30 \times x^{0.8}$  where x is your your Time Spent Offline (Total) stat.	Spider Sanctuary Quest	10 USxg 1E187
	Earth Core Artifact	Quest Artifact	Unlocks The Secrets of the Underworld upgrade	Requirements: R29 + 2750th Excavation
	Secrets of the Underworld	Quest Upgrade	Unlocks Researches for Dwarves and Drow and provides a bonus for individual research branches. Required once throughout the entire game play and does not count towards the bought upgrade stat.	Prestige Unique Building, Earth Core Artifact	100 QiSxg (1E200), 10 M (1E7) of every FC
Drow Research Upgrade
Name		Description		Requirement	Cost
	Dark Light of Bondelnar	Adds 3 extra Drow research slots: 2 for Warfare and 1 to the faction's facility you are playing. Required to be bought each Drow run.		Flame of Bondelnar artifact (Requires Spider Sanctuaries and 3250 Excavations)	10 SxSpg 1E232, 100 M (1E8) Drow Coins

To Unlock Prestige Research:

1. Uncover the Earth Core Artifact with any Faction, and gather enough gems to be able to buy the Secrets of the Underworld (100 QiSxg (1_E200) coins and 10 M (1_E7) FCs)
2. When ready, play a Vanilla faction (Good Faction for Dwarf, Evil for Drow). Choose one that will be able to afford the Secrets of the Underworld. Do not buy the Vanilla faction's Unique building upgrade until you have bought the prestige Trade Treaty.
3. Once affiliated with the prestige faction, buy their Unique building quest, Unique Building upgrade, and then the Secrets of the Underworld. With the latter, the research button and prestige research will show up.

After you have unlocked Prestige research, the Vanilla unique building and Vanilla researches can be acquired before purchasing the prestige trade treaty. Plan in advance to not use up all your RUS on Vanilla researches, as prestige researches only show up after you affiliate with a prestige faction.