勦滅 (Sōmetsu) is an original composition by siqlo commissioned for maimai DX, first appearing in the BUDDiES PLUS update on May 10, 2024. siqlo, a producer rooted in the club music and electronic scene, delivers a driving, aggressive track defined by a pronounced tempo shift, the song launches at 200 BPM, drops to 150 during its middle section, and accelerates back to 200 for its climax. The title, read as sōmetsu (そうめつ), means "annihilation" or "to destroy completely," a choice that sets the tone for both the music and its in-game context. 勦滅 sits within the Metropolis Chihou 8 course, a themed area that weaves a sci-fi narrative across its song lineup. The in-game flavor text introduces a storyline about ニュート (Newt), a new energy source discovered in Tokyo, Professor 黒楼哉輝 whose research links Newt development to a spreading石化症 (petrification disease), and the ensuing ニライカナイ計画 (Nirai Kanai Project) to neutralize the environmental damage. This narrative arc positions 勦滅 as a climactic chapter between the preceding course song Cider P@rty and the following Lunatic Vibes. On the gameplay side, the MASTER chart, designed by ロシェ@ペンギン (Roshe@Penguin), carries a level 14 rating with 1,030 total notes, including a dense mix of 77 Touch and 48 Break notes that demand both accuracy and stamina. The EXPERT chart, handled by はっぴー (Happy), offers a challenging 11+ experience with 581 notes and a heavy concentration of Holds. The song's jacket art and video production were created by サム (Sam).