Anointed Peacekeeper: Stop things from being cast! Stop things from being used! Stop fetch lands! A very versatile answer to every day modern problems.
Archon of Emeria: Active hate just generally slowing down the game. The one spell a turn restriction also stops cascade.
Batterskull: A vigilant lifelinker for those long grindy matchups
Blast Zone: A flexible situation for us to constantly accidentally destroy our own aether vials.
Burrenton Forge-Tender: Pro red creature that can take on equipment when necessary, but it's main draw is the sacrifice that can just shut Fury down completely.
Cathar Commando: 3/1 flash for the aggro moves, Sac to destroy an artifact or enchantment
Declaration in Stone: Rhinos. Anything making token creatures actually. Maybe even vs creativity?
Drannith Magistrate: vs graveyard, cascade, red card cheat (March of Reckless Joy, Light Up the Stage, etc), "cast from top of the library" effects.
Elesh Norn, Mother of Machines: Double out etb, end theirs. and 4/7 vigilance. Can't beat those stats
Emeria, Shattered Skyclave
: A bolt land, but we can exile it to Solitude and in very rare occasions, we actually cast the spell side for 2 4/4 angels
Field of Ruin: On the worst day, it destroys something nice and we each get a land. On the best, Arbiter stops all that nonsense
Hushbringer: Stops ETB and dying triggers cold. If necessity dictates, we can live without ours too
Kaldra Compleat: The new living weapon on the block but oh boy.... 5/5 haste, trample, first strike and indestructible. Fetchable and put into play with Stoneforge Mystic
Leonin Arbiter: In a world without wasteland, this stops our land destruction suite from giving them lands. It also stops other searching
Lightning Greaves: Allows us to breath a little sigh of shroud-y relieve
Linvala, Keeper of Silence: A flying threat that turns off opponents creature abilities - I'm looking at you yawg ^^
Metropolis Reformer: Gives you hexproof. Gives you some life. is an excellent sword-bearer
Mishra's Factory: A little aggro, a guaranteed creature. Can even equip something for just a turn if necessary.
Rest in Peace: Shuts down graveyards completely
Serra Paragon: Let's bring everything back again! A beast once up and running.
Shadowspear: Trample and Lifelink, removes pesky hexproof and indestructable
Silent Clearing: It can hurt to use when you need it but it draws you a card once you don't!
Skrelv, Defector Mite: essentially giver #5. But Also gives toxic
Strict Proctor: Stops combos in their tracks
Stoneforge Mystic: Gets all of out lovely equipment and living weapons and throws them on the battlefield
Sword of Fire and Ice: A must block. If it isn't blocked this can do damage to a player or simply a chump creature that didn't block. It also draws a card and offers offers protection.
Sword of Light and Shadow: Evades black and white removal, gains some life, gets us our creatures back.
Thalia, Guardian of Thraben: The one, the only - Thorn in everyone's side. Taxes all non creature spells making everything that much slower
Timeless Dragon: A big late game flyer, early game planescycling to eternalize later
Touch the Spirit Realm: Bounce or exile an artifact or creature. So flexible
War Priest of Thune: like loran. less vigilance and only enchantments but also 1 cheaper
Werefox Bodyguard: Instant speed removal on a stick. Also makes for some odd self preservation moments.