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Khan retreated into his mind as the soldiers handled the departure. The scientist's explanation had given him ideas on how to advance his project on magic items, and he used the wait to explore them.
A will was a complicated existence, and creating one involved many hurdles. Khan had tried to use intense feelings and memories to build something that matched his requirements, but his approach had probably been too forceful.
Fusing the violent nature of Khan's mana with his intensity could only lead to unstable results, hence the explosions. However, he might avoid those dangerous reactions if he split the procedure into multiple phases, slowly letting his blood transform into what he desired.