It's a planned budget ritual deck for the next Legacy Cards Assemble Event in Master Duel. The meta revolves around Number 4: Stealth Kragen, so any deck that can resist monster effect destruction has a good chance of beating it. This deck's goal is to summon Archfiend's Awakening who can't be destroyed by battle, except with a ritual monster, or monster effect, except those of ritual monsters. This effect of Archfiend's Awakening completely invalidates Stealth Kragen, allowing you to attack with impunity.
To make Archfiend's Awakening even more unstoppable, ritual summon it by using Djinn Demolisher of Rituals as tribute. If the Demolisher of Rituals is used for a ritual summon, then that ritual monster cannot be targeted by your opponent's card effects. This prevents your opponent from getting rid of Archfiend's Awakening with cards like Jelly Cannon, Compulsory Evacuation Device, and Nightmare Penguin. The Demolisher of Rituals can also banish himself from your graveyard to substitute for a monster that would be used a ritual summon. You can send him to your graveyard with Dark Sacrifice.
Dark Sacrifice is great in this format because it can negate card effect destruction from common cards like Stealth Kragen, Mystical Space Typhoon, Shiranui Style Swallow's Slash, and Mirror Barrier.