The style of Next Life is a bit tricky to explain briefly. So instead, I shall explain it not-so-briefly. Video game metal would be one term, but it's way too narrow. In addition to that, Next Life is progressive, extreme, partly electro, aggressive, and heavy. And metal. It is the first band I've found that can be classified into progressive metal but has songs that are most often less than two minutes in lenght. Brief and progressive. And yes, they are purely an instrumental band. No singing is needed.
Artificial Divinity gets a 9/10 from me.
Check out one of the heaviest songs of Artificial Divinity, Anti Matter:
Next Life on Facebook.