Just a quick summary of the comments made by MigrantP about the unlock:
Does the unlock condition contain any sequences of events that must occur in a particular order relative to one another? Yes
Does the unlock condition contain a value that is a function of (H)? No
Does the unlock condition contain the word "Equipment"? Yes
Does the unlock condition contain the word "damage"? No
Does the unlock condition contain the phrase "The Shadow Cloak"? No
The first response is interesting. Has a registry key been identified for Writhe? If not, then this would hint that there is a sequence of things that must occur within the same fight, right?
Well, I just unlocked him, no idea how. I played the four Void Guard heroes against The Dreamer and lost. I'd post my log, but I'm on a Mac and various people in the Discord tried to help me find my log a while back and it wasn't where it's supposed to be, so . . . I don't know how to do that. I wasn't specifically trying to find the unlock, so I didn't really pay attention the the sequence of events. Wish I could be more helpful.
Bad news: When I lost, I hit "try again" or whatever the thing is that starts the game over, and even though I didn't actually start the new game, it looks like that was enough to delete the previous game's record. Well, I tried.
TLT, Idealist, Mainstay, Dr. Medico, and Writhe against Ambuscade in Final Wasteland.
I wasn't even going for the unlock, just trying out the Void Guard heroes after not playing SOTM for a while. Since order and equipment matter I can say that I played Shadow Cloak using Writhes power, umbral siphoning during my play phase (used that power a few times), and used somber tinker to play Portable Dark Lab but never used the power.
Also just created an account to post our log for an also accidental unlock. We were playing the Weekly One Shot (Omnitron-U, Supply and Demand Benchmark, Cosmic Inventor Writhe (ironically), Dark Watch Setback, and Hunted Naturalist against the Chairman in Omnitron IV). Unlocked as soon as Omnitron-U brought the Chairman down to 0, but before the Operative died, so before the end of the game.
> I could not even tell you what I did. Writhe had two cards out all game, tops, including the Shadow Cloak. He used Umbral Siphon a couple times before I spent the last few rounds of the game just having him double-skip because he was low on cards. Everyone else just did their usual thing, I played no one in any particular way.
I’m going to have another wild stab in the dark - Complete a game with Void Guard Write on the Team. More Equipment cards must enter play during the game than Writhe plays other types of cards.
I've never been into the unlocking but I accidentally did it today and saw that there was no asnwer for him yet so I thought I'd help add data for others.
I had Omnitron X, Expatriatte, Writhe, Nightmist, and Bunker against Gloomweaver. I defetaed Gloomweaver with Writhe by using the Cloak Projector and destroying the Shadow Cloak. I had plenty of equipment out as you can imagine with this cast of heroes. I was fighting in the Realm of Discord and Time Flies came out. Using Adhesive Grenades, Bunker kept it out like that for three turns in a row so I was really flush with cards. I don't know enough about this unlocking to tell you more that might be useful, but hopefully that will be of some help.
I don't believe you need to complete a game to get the unlock. Just destroy a target. My friend got CI when flipping Kargra from flip to front, with less than 20 tokens.