yugioh spellcaster's command structure deck list Yu-Gi-Oh! - Twister (SDSC-EN033) - Spellcasters - Unlimited Edition Fully Compatible with all YuGiOh YuGiOh YuGiOh 5D's Structure Deck:

Whether you care about Zombies, tokens, or just have a lot of creatures in your graveyard, Tombstone Stairwell can create a massive temporary army

There were a few decklists running it in Pro Tour Aetherdrift at the weekend, and it's also been sighted in Modern Challenges, as well as even older formats

Thanks doc

List of Mutate Cards Archipelagore Auspicious Starrix Boneyard Lurker Brokkos, Apex of Forever Cavern Whisperer Chittering Harvester Cloudpiercer Cubwarden Dirge Bat Dreamtail Heron Essence Symbiote Everquill Phoenix Gemrazer Glowstone Recluse Huntmaster Liger Illuna, Apex of Wishes Insatiable Hemophage Lore Drakkis Majestic Auricorn Migratory Greathorn Mindleecher Mysterious Egg Necropanther Nethroi, Apex of Death Otrimi, the Ever-Playful Parcelbeast Pollywog Symbiote Porcuparrot Pouncing Shoreshark Regal Leosaur Sawtusk Demolisher Sea-Dasher Octopus Snapdax, Apex of the Hunt Souvenir Snatcher Trumpeting Gnarr Vadrok, Apex of Thunder Vulpikeet Zagoth Mamba The Best Mutate Cards #5

So a monster that requires 3 tributes must really be worth summoning