Oftentimes, these cards are fun spinoffs of real Magic cards, such as No Mercy and Snow Mercy, and Mishras Workshop and Mishras Toy Workshop
Later in the game, Awakening Hall gives you a lot of value (or a lot of sacrifice fodder to keep doing the thing)
Playing Etali as your commander gives you even more chances to trigger his ability and go crazy
When I look at the formats page, there are seven listed Commander, Standard, Vintage, Legacy, Modern, Block, Team Unified Constructed
Id love to hear about your favorite cards in your Modern collection, so be sure to let me know on Twitter at @RappaciousOne
Chrome Mox Zuran Orb Brainstorm Sensei's Divining Top Mystical Tutor Spell Pierce Swords to Plowshares Fire/Ice Lightening Helix Snapcaster Mage Balance Isochron Scepter Remand Arcane Denial Lat-Nam's Legacy Disenchant Trinket Mage Timetwister Jace, the Mind Sculptor Elspeth, Knight Errant Gideon Jura Temporal Mastery Terminus Bonfire of the Damned 16 Lands (I cannot be bothered to work out a sensible mana base for a deck I'm not going to battle with, sorry