While this trend will not be introduced during Theros, there are still powerful legends to build decks around
An extremely efficient deck, Izzet Delver relies on one-mana creatures like Delver of Secrets and Dragon's Rage Channeler to create solid flying creatures and then prevent your opponents from doing anything with a strong counter package

Advanced Search Sets Random Syntax Agatha of the Vile Cauldron Akoum Stonewaker Akroma's Memorial Akroma, Angel of Wrath Akroma, Angel of Wrath Avatar Akroma, Vision of Ixidor Alexios, Deimos of Kosmos Angelfire Ignition Arbalest Engineers Arlinn, Embraced by the Moon Arlinn, the Moon's Fury Atalan Jackal Badgermole Ball Lightning Balustrade Wurm Barbed Shocker Become Brutes Bladecoil Serpent Blistering Firecat Blitz Hellion Bringer of the Red Dawn Burning-Yard Trainer Cactusfolk Sureshot Cairn Wanderer Carnival Barker Cavern-Hoard Dragon Centaur Chieftain Charging Monstrosaur Charging War Boar Chariot of Victory Clackbridge Troll Clickslither Coastline Marauders Colossal Growth Commander Mustard Cori-Steel Cutter Cosmic Spider-Man Craterhoof Behemoth Darigaaz Reincarnated Death-Mask Duplicant Decimator of the Provinces Demolisher Spawn Depthshaker Titan Destiny Spinner Devilish Valet Dinosaurs on a Spaceship Domri Rade Domri, Chaos Bringer Domri, City Smasher Dr

I think [[Abandoned Air Temple]] could genuinely shine in Standard if the format slows down after the expected bans
10 Food Chain Food Chain is a card that is almost never going to be used in any fair capacity