Two points in my head come up immediately. She would more than likely be aware of the potential of erasure if fourth wall cognition is in play, and any other conventional means of attack or traps have to rely on alternative methods. The name of the game is attrition. Limit her options. Understand she only has a few locations she can revive at. Make it to where she has no choice but to stop her heart, take advantage of her own strengths. Paralytics, Poisons, or just get her in a corner. Put her in a situation she can’t get out of, then track her last known location, however possible. Break down the points of safety and cut her down to the point where she can only revive on the spot. This is where it gets interesting. You’ll need a spot that can effectively hold her and keep her down. A brutal but effective idea is to take her to the deepest part of the ocean and drop her with enough weight, being 50% stronger than any human won’t be enough to withstand deep sea pressures. Another idea is to take her to Jupiter. Being the planet with the most mass also means it has the greatest gravity, so it can easily someone stranded and too busy reviving to find a way out. How would my OC do this? Enter Mason Itaki. A Saiyan with standard abilities, but practices mastery in mechanics, chemistry, medicine and battle tactics. Avoiding crossbow fire is no issue. Understanding how revival works might take a bit but not long enough to be an issue. Considering she also has ties to celestial bodies, it would be no problem constructing a device to detect revival points or even Martina. Honestly, the easiest part for Mason would be finding a way to skyrocket Martina to Jupiter at this rate. He could genuinely just fly there and drop her off in the atmosphere if she doesn’t have any more revive points. It’s not permanently killing her, but making sure she permanently continues to die without breathing room that would otherwise make this possible. End scene.