A new ship module, either from the market or from a medal about raiding a certain number of ships. Would be some kind of teleport that increases your chance of getting a successful raid, however the chance of getting a critical fail/crew death would be greatly increased (representing a chance of materialising within a wall or just Pony's trophy pile)

any thoughts?

If there were an artifact/module like this, I would not use it. I'd rather fail a raid than increase chances of a crew member dying.
Instead of something like this, to increase my raiding chances I increase the number of crew on my ship.

-1 we already have a profession that increases raiding, and if your having a issue with raiding start puttin pionts into crew.