With Santi likely to be missing large chunks of the season again we need a midfield schemer in a similar mould. Seri seems ideal, looks confident, good technique(for an African), good vision, can pass long and short, can shoot, fairly mobile and gets stuck in when he needs to. Approaching prime age aswell and his wage demands shouldn't be a issue neither. It's a no brainer.
If 40M€ is too steep, then just go and get the new Santi Cazorla, Dani Ceballos from Betis. Kids a skillist of the highest level.