When I first speak to Scottish rapper Matt Shields, better known as Bloody Shield, he’s in the kitchen of a flat in Glasgow without a phone charger, and our call is at risk of cutting out. Luckily, it doesn't take much battery for the 23-year-old artist to jump straight into what’s been consuming him lately: finishing Year of the Horse, the new mixtape he has spent the past few monthshellip;read more raquo;