It has a CMC of five but is reduced by three mana of any color when that player controls a Giant
Standard, for example, is a rotating format, meaning it only allows you to play specific cards that have been printed in recent times
Coiling Oracle is a gold standard two-drop: get a card or put a land onto the battlefield
Doran, the Siege Tower, Teneb, the Harvester, Overgrown Estate, and that's it
He also mills your opponents for each damage dealt to them by your Horrors in combat, and gives you something for free each turn from the stuff you milled
Arrows of Justice Aurelia's Fury Boros Charm Captain's Maneuver Chance for Glory Deflecting Palm Double Cleave Fight to the Death Fire at Will Foundry Helix Frontline Rush Fuss // Bother Heartwarming Redemption Hide // Seek Integrity // Intervention Integrity // Intervention Intimidation Bolt Inventory Management Justice Strike Legion Leadership Lightning Helix Lorehold Charm Lorehold Command Make Your Mark Martial Glory Master Warcraft Moonhold Odds // Ends Olrin's Searing Light Rally the Righteous Reflect Damage Response // Resurgence Ride Down Sacred Fire Shattering Blow Suspend Aggression Take the Bait War Flare Warleader's Helix Wilt in the Heat Zenith Flare
