Sydney-based Sienna Skies deliver a metalcore kick with plenty of blood and muscle behind it on their sophomore album, adding enough experimentation to their hellacious roar to make the results interesting as well as assaultive. Instead of just hammering out hardcore clichés, the band brings a sense of dynamic tension and release to these tracks. Cogent riffage and blast-beat volleys create shifting textures beneath Steve Faull's howling vocals. With a deft hand, the smoldering aggression within tunes like “Realization” and “Foundations” gives way to soaring melodic passages before descending back to the depths. “Sooner or Later” takes the band to a particular peak of violent anguish, powered by Damon Brohier’s explosive drumwork. The twin guitar lines of Michael Sankey and Nick Musgrave interweave with impressive nuance, hinting at prog-rock instincts without sacrificing hardcore brutality. It all comes together in “Achiever,” an anthemic number with a memorable pop hook driven home by a shout-along chorus. All told, The Constant Climb suggests that Sienna Skies are just starting to reach their peak.