Z-Metal Tank X LIGHT Level 4 [ Machine / UnionEffect ] ATK 1500 DEF 1300 Once per turn, you can either: Target 1 "X-Head Cannon" or "Y-Dragon Head" you control

Academy Raider Akki Raider Bloodbraid Challenger Bloodbraid Elf Bloodbraid Marauder Bog Raiders Braid of Fire Braided Net Braided Quipu Braids's Frightful Return Braids, Arisen Nightmare Braids, Cabal Minion Braids, Conjurer Adept Braids, Conjurer Adept Avatar Braidwood Cup Braidwood Sextant Cache Raiders Captain Storm, Cosmium Raider Commando Raid Deathbellow Raider Erg Raiders Fire Nation Raider Flamebraider Frenzied Raider Gallowbraid Gastal Raider Gathan Raiders Ghost-Lit Raider Goblin Deathraiders Goblin Raider Goblin Sky Raider Goblin Tomb Raider Golgari Raiders Gorehorn Raider Hell-Bent Raider Immersturm Raider Impromptu Raid Kari Zev, Skyship Raider Keldon Raider Kraul Raider Kresh the Bloodbraided Kresh the Bloodbraided Avatar Lavastep Raider Massive Raid Merchant Raiders Merfolk Raiders Mine Raider Mogg Raider Monastery Raid Mons's Goblin Raiders Mudbrawler Raiders Nocturnal Raid Okiba Reckoner Raid Pheres-Band Raiders Prossh, Skyraider of Kher Protean Raider Raid Bombardment Raiders' Karve Raiders' Spoils Raiders' Wake Raiding Nightstalker Raiding Party Raiding Schemes Ravine Raider Redcap Raiders Requisition Raid Riphook Raider Rose, Cutthroat Raider Rubblebelt Raiders Ruin Raider Saprazzan Raider Shoreline Raider

Then you should not only have all 80 cards but also all types of them
Most notably, Sisay's activated ability can be used if you pay one mana of each color, tutoring for a legendary permanent with a mana value less than Sisay's power, putting that card directly into play