Its heavily played in 3- to 4-color decks, while it allows for easier splashes for activated abilities and off-color flashback or kicker costs
Rondo allows you to equip the Equip Spell Card to an opponent's monster and take control of it, lasting until Rondo is taken off of the field

Scientists Abomination of Gudul Academy Elite Academy Wall Academy at Tolaria West Action News Crew Adventurer's Airship Agna Qel'a Agonasaur Rex Airship Crash Akroma's Blessing Akroma's Vengeance All-Seeing Arbiter Alpharael, Dreaming Acolyte Altanak, the Thrice-Called Ancestral Reminiscence Ancient Excavation Angel of the God-Pharaoh Angelsong Anvil of Bogardan April, Reporter of the Weird Arcade Gannon Arcane Subtraction Archfiend of Ifnir Architects of Will Archive Haunt Arm-Mounted Anchor Artful Looter Artificer's Epiphany Artistic Refusal Assassin Gauntlet Astral Drift Asylum Visitor Atemsis, All-Seeing Atlantean Skirmisher Attunement Aura Extraction Avian Oddity Avishkar Raceway Awaken the Honored Dead Backslide Bag Check Bag of Holding Bandit's Talent Bant Sojourners Baral, Chief of Compliance Barkhide Mauler Baron Strucker, HYDRA Overlord Barren Moor Barrier Breach Basri, Tomorrow's Champion Battlewing Mystic Bazaar Trademage Bazaar of Baghdad Bellowing Crier Beneath the Sands Benthic Biomancer Blasted Landscape Bloated Toad Blood Fountain Blood Servitor Bloodcrazed Socialite Bloodsoaked Reveler Bloodvial Purveyor Blurry Beeble Bonded Fetch Bone Miser Boon of the Wish-Giver Bountiful Landscape Break Asunder Breakthrough Brilliant Spectrum

Maybe you catch the scent of fresh packaging, or spot the familiar creases leftover from age
Benthic Biomancer is a similar card that allows you to loot instead