Aerial Extortionist Angelic Gift Angelic Sell-Sword Armed with Proof Case of the Pilfered Proof Cast Out Celebrate the Mountain-king Chosen by Heliod Curse of Silence Dawn of a New Age Detention Chariot Eagle of Deliverance Elspeth Conquers Death Errand-Rider of Gondor Farsight Adept Form of the Approach of the Second Sun Four Knocks Glimmer Lens Inspiring Commander Inspiring Overseer Invasion of Dominaria Loran of the Third Path Mentor of the Meek Nick Fury, Spymaster Novice Inspector Orator of Ojutai Origin of the Avengers Ox Drover Pentarch Ward Potion of Healing Priest of Ancient Lore Primary Research Professor of Symbology Puresteel Paladin Raffine's Informant Resistance Squad Roving Harper Rumor Gatherer Rune of Sustenance Sage's Reverie Sanctuary Warden Search Party Captain Serene Sleuth Settlement Blacksmith Sigarda's Splendor Slayer's Bounty Spark Rupture Sparring Regimen Spirited Companion Splinter, Aging Champion Stack of Paperwork (playtest) Staff of the Storyteller Stalwarts of Osgiliath Tale of Tinviel Teyo, Geometric Tactician The Mountain-king's Return The Night of the Doctor The Princess Takes Flight The Restoration of Eiganjo Thraben Inspector Trial of a Time Lord Unquestioned Authority Vault 101: Birthday Party Wall of Omens Wedding Ring Woodland Acolyte

Then the player whose Notion Thief's effect was chosen repeats this process among the remaining Notion Thief effects, and so on, until there are no more possible such effects to apply
By focusing on direct damage, attack, and protection, Steel has elements of Red and White from Magic: The Gathering
We do lose some flexibility here, but making two copies of a critical Creature for your deck can help you meet your goal
Creature - Human Samurai Color tag templates(None) Samurai Enforcers Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.) Creature - Human Samurai Color tag templates(None) Sigil of Valor Whenever equipped creature attacks alone, it gets +1/+1 until end of turn for each other creature you control
Well the numbers here are much better: I count 23 cards that are Elves or create them, and 8 cards that care about Elves (Galadhrim Ambush)