Love is in the air. Lust would call it love, anyway. Isaac might have a different opinion. You must guide your characters to victory while fighting off the love-stricken monsters pursuing you, before taking down Lust herself. Be careful, though; love is a powerful drug, and those monsters aren’t going to be happy if you turn down their advances…
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Setup
Game Modes
FAQ
Challenge Cards
Credits
Setup
Card(s) Needed
Goal
The challenge is won when Lascivious Lust dies.
Setup
- Choose a difficulty level for the challenge:
Normal Hard Ultra Hard - Set up as normal for solitaire/co-op mode.
- Place Lascivious Lust face up to one side of the monster slots in a final boss slot.
(feel free to use your regular Mask of Infamy card as a stand-in to represent this!)
Normal
HardGlobal Modifiers
Love Wins
$: Remove a love counter from yourself:
Prevent the next 1 damage you would take this turn.
The Thought That Counts 
Each time you declare an attack, you may lose 3¢ or discard a loot card to put 3 love counters on yourself.
The Thought That Counts 
/ 
Each time you declare an attack, you may lose 3¢ or discard a loot card to put 2 love counters on yourself.
Uncontrollable Desire
At the start of each turn, the active player rolls for each monster except the final boss-If the result is less than or equal to the number of lust counters on that monster, put a lust counter on the final boss, then put that monster in a minion slot if it isn’t already. You must attack it once this turn if able.
Remember that the specific rules and global modifiers for this challenge are used in addition to the general challenge rules that apply to all challenges. The general challenge rules can be downloaded separately from maestromedia.com.
Game Modes
Normal
While the number of souls controlled by all players is less than 6, Lascivious Lust can’t be attacked or take damage.
Each time a monster takes combat damage, it deals 1 damage to the attacking player.
At the end of each turn, put a lust counter on each other monster.
For every 3 lust counters on Lascivious Lust, it has +1
.
Hard
While the number of souls controlled by all players is less than 7, Lascivious Lust can’t be attacked or take damage.
Each time a monster takes combat damage, it deals 1 damage to the attacking player
At the end of each turn, the active player rolls-
1-3: Put a lust counter on each other monster.
4-6: Put 2 lust counters on each other monster.
For every 3 lust counters on Lascivious Lust, it has +1.
Ultra Hard
While the number of souls controlled by all players is less than 8, Lascivious Lust can’t be attacked or take damage.
Each time a monster takes combat damage, it deals 1 damage to the attacking player.
At the end of each turn, put 2 lust counters on each other monster.
For every 2 lust counters on Lascivious Lust, it has +1.
Competitive Variant
This challenge is primarily designed for solo and co-op mode, but you can also play a game of regular competitive Four Souls with an added twist.
Setup as normal for a competitive game. Place Lascivious Lust face up to one side of the monster slots in a final boss slot (use the competitive variant version of Lascivious Lust 
).
The competitive variant of the challenge works broadly very similar to the solo and co-op version. The key difference is that the global modifier Uncontrollable Desire puts monsters in lust slots rather than in minion slots.
Lust slots are a new type of slot specific to this challenge. Like minion slots, lust slots are temporary and are not refilled when empty. Unlike minion slots, each player has their own personal lust slots. On each turn, only monsters in the active player’s lust slots are considered in play and can be targeted by attacks or abilities.
Lascivious Lust can’t have attacks declared against it or take damage while the active player controls less than 3 souls. The active player wins when Lascivious Lust dies.
FAQ
If multiple monsters must be attacked on a turn due to the Uncontrollable Desire global modifier, can I choose which I attack?
Yes. You can choose which of the monsters you attack. If you use up all of your attacks for the turn, or die, then you will not then be able to attack any of the other monsters. If you do have any additional attacks and are still alive after the previous attack ends, however, you would be forced to use those additional attacks to attack any remaining monsters that Uncontrollable Desire was forcing you to.
Challenge Cards
Credits
| Creator of Four Souls | Edmund McMillen |
| Challenge Design | Charlie Gill |
| Challenge Art | orisghost |
| Producer | Dustin Wessel |
| Editors | egghorse, Cody Underwood |
| Rules Advisor | Sevenut |
| Official TTS Table | Jeremy Silliman, maths |
| Playtesting TTS Table | Troy Thompson |
Information on this page is transcribed from the official PDF file with minor edits to grammar for clarity.