Thailand’s mathcore newcomers Mutation Wrld have unleashed a striking demo that blends the chaotic energy of bands like Norma Jean, Vein.fm, and Misery Signals. This debut offering showcases a raw yet promising take on heavy music, with a mix of harsh vocals, dissonant riffs, and eerie atmospheres that will resonate with fans of the genre.

The standout feature of this demo is its versatility. The vocals are a highlight, offering a range of styles from harsh, vein-popping screams to shaky but emotionally charged clean singing. The riffs are equally dynamic, shifting between intricate, mathcore-inspired dissonance and crushing chugs. The bass provides a crunchy foundation, while the drums snap and pop, though they could benefit from slightly more prominence in the mix. Throughout the demo, there’s a haunting, crisp atmosphere that ties everything together and keeps the experience cohesive.

The demo opens with a dark, eerie "intro" layered with digital sounds and faint screams that set a chilling tone. As dissonant guitars creep in, they explode into mathcore-style riffs backed by a snappy snare and crunchy basslines. The production is clear, emphasizing a raw energy reminiscent of Norma Jean and Vein.fm. This intro effectively sets the stage for what’s to come.

"Street of Lies" track is pure mathcore chaos. The vocals are intense and emotional, capturing a vein.fm-like ferocity. The riffs alternate between lighter, intricate playing and heavy, chugging breakdowns, while the bass adds weight to the mix. The drums have a deep, impactful presence, driving the song’s dynamic structure. Though the breakdown here isn’t the strongest, the combination of dissonant riffs and powerful vocals makes it a standout piece.

Transitioning smoothly from the previous track, “Unbodied” delivers solid, consistent riffs and intricate cymbal work. The vocals shine in the middle section, offering a mix of bold screams and eerie clean melodies. The melodic section provides a refreshing contrast, leading into a powerful buildup and an intense breakdown that hits hard.

"Burning Rhapsody" takes a more erratic approach, with heavy riffs that still maintain a sense of flow. There’s a strong mid-2000s metalcore vibe here, but Mutation Wrld infuses it with their own modern twist. The vocalist demonstrates impressive range, shifting between styles effortlessly. The midsection grooves hard, brimming with raw energy, while the slow, crushing breakdown is nothing short of brutal. The combination of chugging riffs, pummeling drums, and guttural vocals makes this a standout moment on the demo.

Closing the demo is “Empty Dissonance,” a slow, ambient piece that departs from the chaos of earlier tracks. Opening with a creepy, atmospheric soundscape, the track evolves into a chill, introspective ending that highlights deep, resonant guitars. This Misery Signals-inspired conclusion adds a reflective layer to the demo, tying the project together with a sense of haunting finality.

Mutation Wrld’s debut demo is a solid introduction to their potential in the mathcore and metalcore scene. While the clean vocals could use some refinement and the drum mixing could be slightly more balanced, the demo is packed with creative ideas and raw emotion. With its mix of dissonant riffs, versatile vocals, and eerie atmospheres, this release is sure to appeal to heavy music fans eager for fresh talent. Keep an eye on Mutation Wrld—they’re just getting started.