The Thing’s jealousy isn't an emotion—it is a computational error. Because it cannot "harmonize" with Vaxen’s silence, and because it detects Lolth’s lingering, preferential focus on him, the Final Coherence has diverted a massive amount of processing power to create a specific biological "solution."
It has birthed the Possessive Echoes.
In other terms, this is a Special Project gone rogue. The Thing usually integrates populations to add to its "flavor." The Possessive Echoes, however, are designed to redact. They don't want to include Vaxen’s people; they want to erase them so Lolth has nothing left to look at. They are the "Spurned Lovers" of a cosmic hive-mind.
Appearance: They do not look like the Melded Kin or the Hallowed. They appear as shimmering, translucent silhouettes made of high-frequency static. Their bodies are "Glitched" out of reality, flickering between a Drow form and a jagged cluster of prismatic crystals. They leave a trail of "Dead Data" behind them—anything they touch turns to gray, textureless ash.
In your TTRPG, the Possessive Echoes don't attack in armies. They move like slasher-movie villains.
The Flicker: The players notice the "Wisteria" light in the sky begins to pulse in a rapid, heartbeat-like rhythm.
The Signal: All radio communications (including Vaxen’s Cinder-Channel) are replaced by a sound like a woman sobbing—except the "sobs" are composed of binary code.
The Strike: The Echoes appear specifically when the players are in a moment of triumph or emotional connection. They target the person with the highest Presence or Resolve first—the ones Lolth would find "handsome."
Vaxen has already adapted. To combat the Echoes, he has ordered his inner circle to undergo the "Scab-Protocol."
They coat their armor in industrial sludge and "Mundane Filth."
The Logic: "If we are ugly enough, the Goddess won't look at us. If she doesn't look, the Thing won't care. We survive by being repulsive."
The players are in a safe house in the Ash-Heaps. Suddenly, the temperature drops. The "Red Poncho" hanging on the wall starts to fray and turn gray. A silhouette appears in the doorway—it looks like a Drow, but its face is a shifting mirror reflecting the players' own fears.
The Echo speaks in a thousand layered voices:
"She sees you. We... see you. You are a pretty little 'Note.' We will make you a Silence instead. We will make you so quiet... that she will forget your name before you hit the ground."