>>93210465Yeah it's a pretty simple bit of pymary, all you have to do is take a Core Aspect, something that causes the Khert to throw up an error like their Solidity or something and then the Khert will just delete them.
It's not used because you still have to try and connect with it along a Khert line so the opponent has a chance to react and you have to speak what you're casting (Duane and other tacit casters excluded, though they are vanishingly rare). This means someone will hear what you're doing, be able to react to it, and now knows death is on the table. Most duelists aren't gonna do it. On top of that, it's turbo illegal and able to be tracked in the Khert hubs when it's done on living human flesh since it's illegal pymary. Very high chance of getting tracked down. It also has the propensity of bouncing back on the caster depending on how big of a thing you're trying to Core Leech. Core Leech a pebble, that's fine, but anything bigger and the Khert may delete the caster instead of the target for sake of ease. It's much easier to delete the offending caster than an entire house for example.
Now, if you look at situations where shit has gone down, people do break out of the Core Leech when it's warranted, but even Duane wasn't able to one-hit-quite the Silver Beast because it detached the part that was being Core Leeched.