Ah, nothing
Devoted Druid A delightful little combo piece, this Elf Druid debuted in 2008s Shadowmoor set, and it has been granted a number of infinite combos due to its easily abused activated abilities of tapping to add one green mana to your mana pool and the more important one putting a -1/-1 counter on it to untap it
It has appreciated 244% from its launch price of ~16,000
Whats more, the layered foil work makes the Stone appear almost three-dimensional, as if its hovering just beneath the surface

Decklist: The Wandering Minstrel in Casual Commander The Wandering Minstrel | Illustration Thanh Tun Commander (1) Creature (34) Aesi, Tyrant of Gyre Strait Avenger of Zendikar Coiling Oracle Courser of Kruphix Dryad of the Ilysian Grove Emeria Angel Freestrider Lookout Gladiolus Amicitia Greensleeves, Maro-Sorcerer Icetill Explorer Iridescent Vinelasher Lotus Cobra Mina and Denn, Wildborn Mole Man, Moloid Master Moraug, Fury of Akoum Omnath, Locus of Rage Omo, Queen of Vesuva Oracle of Mul Daya PuPu UFO Rampaging Baloths Reckless Pyrosurfer Risen Reef Rootpath Purifier Sabotender Sakura-Tribe Elder Scute Swarm Sporemound Springheart Nantuko Tannuk, Memorial Ensign Tatyova, Benthic Druid The Necrobloom Tiller Engine Tireless Provisioner Tunneling Geopede Instant (7) Artifact Mutation Aura Mutation Crop Rotation Growth Spiral Harrow Heroic Intervention Swords to Plowshares Sorcery (5) Explore March from Velis Vel Reach the Horizon Scapeshift Travel the Overworld Enchantment (11) Beastmaster Ascension Case of the Locked Hothouse Chocobo Racetrack Dragonback Assault Druid Class Felidar Retreat Khalni Heart Expedition Retreat to Emeria Retreat to Hagra Spelunking Valakut Exploration Artifact (5) Amulet of Vigor Arcane Signet Chromatic Lantern Fellwar Stone Sol Ring Land (37) Adventurer's Inn Balamb Garden, SeeD Academy Baron, Airship Kingdom Capital City Command Tower Crossroads Village Eden, Seat of the Sanctum Evolving Wilds Forest Gohn, Town of Ruin Gongaga, Reactor Town Guadosalam, Farplane Gateway Insomnia, Crown City Ishgard, the Holy See Island Jidoor, Aristocratic Capital Lindblum, Industrial Regency Midgar, City of Mako Mountain Path of Ancestry Plains Planar Nexus Rabanastre, Royal City Reflecting Pool Sharlayan, Nation of Scholars Simic Growth Chamber Snow-Covered Forest Snow-Covered Island Snow-Covered Mountain Starting Town Swamp Thespian's Stage Treno, Dark City Vector, Imperial Capital Vesuva Windurst, Federation Center Zanarkand, Ancient Metropolis This isn't the most creative role for The Wandering Minstrel but rather a golden oldie

You can quickly replicate an arsenal of equipment tokens with Arna, and since it triggers anytime a modified creature you control attacks, you can go wide with your creatures