@ Naki: Had Doom killed Storm he mystically would not have been able to open the vault.
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I don't know how he got into the vault and if he used Storm to do so, he would no longer need her. He clearly had removed all the vibranium before T'Challa arrived; hence, the word CHECKMATE written on the inside of the vault. And clearly if he did use Storm, the act didn't kill her. In the end, what appears to be the case is that T'Challa believed the vibranium was still in the vault which is the reason he ran straight to it after Doom tossed his wife his way. Thus, one can easily conclude that T'Challa thought the vibranium was still safe in the vault. Meaning, he choose it over his wife. The pained expression on Ororo's face says is all on the next to last page. Doom, basically took everything from T'Challa and in the end, knew him better than Ororo did. The chess match may not be over, but T'Challa has already lost his queen. Okay, the last part may not be the case, but DAMN, where do you go from here on the trust and marriage front?