I'm going to take you through an example deck I've built, while also going into detail on why Edgar Markov is so good, the typical value found in decks built around him, and some of the key cards you need in any deck he leads

Amped Raptor Ancient Den Arcums Astrolabe Birthing Pod Blazing Shoal Bridge From Below Chrome Mox Cloudpost Dark Depths Deathrite Shaman Dig Through Time Dread Return Eye of Ugin Field of the Dead Fury Gitaxian Probe Glimpse of Nature Golgari Grave-Troll Great Furnace Grief Hogaak, Arisen Necropolis Hypergenesis Jegantha, the Wellspring Krark-Clan Ironworks Lurrus of the Dream-Den Mental Misstep Mycosynth Lattice Mystic Sanctuary Nadu, Winged Wisdom Oko, Thief of Crowns Once Upon a Time Ponder Punishing Fire Rite of Flame Seat of the Synod Second Sunrise Seething Song Senseis Divining Top Simian Spirit Guide Skullclamp Summer Bloom The One Ring Tibalts Trickery Treasure Cruise Tree of Tales Umezawas Jitte Underworld Breach Up the Beanstalk Uro, Titan of Natures Wrath Vault of Whispers Violent Outburst Yorion, Sky Nomad If youre newer to Modern, you may not be familiar with the banlist or the cards on it

Most grading companies see the front centering as a very important aspect of a perfect card and will hold you to the 55/45 standard
Decks based on commanders like Zur the Enchanter Sythis, Harvest's Hand definitely won't like seeing Cleansing Nova resolve
EB-03 Bundle: 1x EN EB-03