(Image credit: Bulwark Studios / Games Workshop) The annual Warhammer Skulls event has mutated over the years, going from a week of discounts and freebies involving Warhammer-themed videogames to a showcase of upcoming additions to that growing library of ultraviolence. This year's edition will be no different, but we're also getting a whole game earlier than expected, with turn-based tactics-em-up Warhammer 40,000: Mechanicus 2 being released during the Skulls event on May 21. We're pretty hyped for this one. Robin Valentine played the demo and called it a tantalising slice of what could be the next great Warhammer strategy game . It'll have a revamped Cognition system , with every unit having its own way of collecting the Cognition points you need to activate abilities and do cool stuff, and will also feature the debut of 40K's space dwarf faction, the Leagues of Votann (or squats if you're an old Warhammer tragic like me).…