ability allows his player a form of recursion by returning an action card from the discard pile whenever he challenges another character
You'll see from our cEDH tier list that, while he's not about to dethrone the likes of Sisay or Kinnan, the Space Marine strategist can do great work, winning games on the spot if you can form an infinite mana generator
Since Commander is a singleton format, this means Snapcaster Mage gives all of your best spells a second charge

Creatures:34 1 Boreal Druid 1 Elvish Mystic 1 Feral Hydra 1 Hungering Hydra 1 Llanowar Elves 1 Mistcutter Hydra 1 Hooded Hydra 1 Leaf Gilder 1 Melira, Sylvok Outcast 1 Primordial Hydra 1 Deathgorge Scavenger 1 Eternal Witness 1 Lifeblood Hydra 1 Managorger Hydra 1 Rhonas the Indomitable 1 Rishkar, Peema Renegade 1 Steel Leaf Champion 1 Thrashing Brontodon 1 Elvish Piper 1 Ivy Lane Denizen 1 Yeva, Natures Herald 1 Gigantosaurus 1 Verdurous Gearhulk 1 Aggressive Mammoth 1 Carnage Tyrant 1 Hydra Broodmaster 1 Hydra Omnivore 1 Oran-Rief Hydra 1 Rampaging Baloths 1 Greater Sandwurm 1 Tornado Elemental 1 Khalni Hydra 1 Vorinclex, Voice of Hunger 1 Ghalta, Primal Hunger Spells:41 1 Adventurous Impulse 1 Attune with Aether 1 Forced Adaptation 1 Lay of the Land 1 Senseis Divining Top 1 Silent Gravestone 1 Sol Ring 1 Unbridled Growth 1 Aim High 1 Blackblade Reforged 1 Bonds of Mortality 1 Emerald Medallion 1 Gaeas Blessing 1 Karametras Favor 1 Land Grant 1 Lightning Greaves 1 Moss Diamond 1 Song of Freyalise 1 Thought Vessel 1 Beastmaster Ascension 1 Crushing Canopy 1 Cultivate 1 Gift of Paradise 1 Growing Rites of Itlimoc 1 Nissas Pilgrimage 1 Retreat to Kazandu 1 Rhonass Monument 1 Helm of the Host 1 Pirs Whim 1 Return to the Earth 1 Whirlwind 1 Doubling Season 1 Overwhelming Stampede 1 Primal Vigor 1 The Mending of Dominaria 1 Caged Sun 1 The Immortal Sun 1 Wave of Vitriol 1 Zendikar Resurgent 1 Praetors Counsel 1 The Great Aurora Lands:25 1 Arcane Lighthouse 1 Detection Tower 20 Forest 1 Scavenger Grounds 1 Temple of the False God 1 Tranquil Thicket Naturally this isnt the final deck list

Grand Larceny is full of pirates, rogues, ninjas, and ne'er-do-wells all eager to take what doesn't belong to them
In lower-power Brackets, Game Changers and infinite combos are nonexistent while in higher-power Brackets, theyre often part of how games end