User blog comment:Godisme/Ephialtes/@comment-3290324-20131004185108/@comment-3290324-20131005173830

Possible, but I seriously doubt he has the means to master anything in his current situation.

And as far as Lieutenants and Bankais go - eew. Bankais are supposed to be rare and hard to obtain. If every Shinigami and their Mama has one, then they lose their appeal.