[Kali_Namir]

Well I found a bit of a catch. You stated that Elder wood pretty much seeks power, and Thestral core will only truly grant it's power to those who face death.

That makes me want to think that with that wood and core combo, the wand would choose to retain as much power as it could, especially from those who have faced death. I feel as though since the wand itself (supposedly) lead to the deaths of many of it's owners it had seen enough death for the core to rely on the wand's retained powers. I almost want to say the Elder wand had no true Owner. It relied only on it's self and it's own power and searched to gain even more...

(but then again, if the wand truly was made by death, then that makes even more sense seeing as how death would wish to lead all those who possessed the wand to meet him and to make sure none of them ever cheated him again...)