Working your way up to a Portal to Phyrexia sounds great, but turning a Treasure token into a Sol Ring aint too shabby either

Release date: 2021-07-23 +2 Mace Arborea Pegasus Blink Dog The Book of Exalted Deeds Celestial Unicorn Cleric Class Cloister Gargoyle Dancing Sword Dawnbringer Cleric Delver's Torch Devoted Paladin Divine Smite Dragon's Disciple Dwarfhold Champion Flumph Gloom Stalker Grand Master of Flowers Guardian of Faith Half-Elf Monk Icingdeath, Frost Tyrant Ingenious Smith Keen-Eared Sentry Loyal Warhound Minimus Containment Monk of the Open Hand Moon-Blessed Cleric Nadaar, Selfless Paladin Oswald Fiddlebender Paladin Class Paladin's Shield Planar Ally Plate Armor Portable Hole Potion of Healing Priest of Ancient Lore Rally Maneuver Ranger's Hawk Steadfast Paladin Teleportation Circle Veteran Dungeoneer White Dragon You Hear Something on Watch You're Ambushed on the Road Aberrant Mind Sorcerer Air-Cult Elemental Arcane Investigator Bar the Gate The Blackstaff of Waterdeep Blue Dragon Charmed Sleep Clever Conjurer Contact Other Plane Demilich Displacer Beast Djinni Windseer Dragon Turtle Eccentric Apprentice Feywild Trickster Fly Grazilaxx, Illithid Scholar Guild Thief Iymrith, Desert Doom Mind Flayer Mordenkainen Mordenkainen's Polymorph Pixie Guide Power of Persuasion Ray of Frost Rimeshield Frost Giant Scion of Stygia Secret Door Shocking Grasp

Until end of turn, those creatures gain "Whenever this creature deals combat damage to a player, draw a card." Sorcery Color tag templates(None) Security Bypass Enchant creature As long as enchanted creature is attacking alone, it can't be blocked
Scarcity of supply also contributes because the printings of Mirrodin pale in comparison to the modern day print run of any current set
The planewalkers ultimate ability is about as Vraska as it gets, giving you an easy out to one-shot opponents with an evasive creature
The card's first ability perfectly captures this function: returning a fallen (graveyard) creature to the battlefield, but in a weakened state (tapped)