Dack Fayden, Helping Hand: Gift Horse

Dack Fayden, Helping Hand costs six and does one big thing when it enters. It reveals cards from the top of your library until it finds one creature for each opponent, puts those creatures onto the battlefield, and hands one to each opponent. They're goaded for the rest of the game, so each one has to attack every combat, and has to attack someone other than you if it can.

So the deck fills its library with creatures that leave something behind for you. Wall of Omens and Ox Drover draw you a card, Blade Splicer and Cloudgoat Ranger make tokens on your side, and Palace Jailer and Archon of Coronation make you the monarch. A Dack trigger in a four-player game is three of those at once, and the bodies go off to fight each other. Restoration Angel, Wispweaver Angel, Cloudshift, Flicker of Fate, Otherworldly Journey and Conjurer's Closet bring Dack back for another round. Akroan Horse, Jinxed Idol and Crown of Doom are gifts you hand over on purpose, Thran Spider gives you and an opponent a Powerstone each, and Bloodthirsty Blade, Martial Impetus and The War Games goad the rest of the table. The gifts do most of the damage for you; Elspeth, Sun's Champion and Martial Coup finish whoever is left. A few creatures, like Combat Calligrapher and Orzhov Advokist, are better cast than revealed, since they protect whoever controls them. Farewell is the reset when the gifts turn on you: choose creatures only, and your artifacts stay. It's a Game Changer, so by the rules this deck is Bracket 3, but it plays at the gentle end of it, so say so at the table.

The rule people get wrong is whose triggers those are. The creatures enter under your control and change hands a moment later, so every "when this enters" ability on them is yours: you draw off Wall of Omens, you get Blade Splicer's Golem, you become the monarch from Palace Jailer, and a revealed Wispweaver Angel can blink Dack for another round. Your opponents control the bodies now, but you still own the cards, so when they die they go to your graveyard, where Sun Titan and Reveillark can bring them back on your side. That includes Starfall Invocation: promise an opponent a card, wipe the board, and you can return Dack himself, since he hits the graveyard before you'd move him to the command zone. Flicker of Fate, Flickerwisp and Charming Prince take one gift back early, and chapter II of The Fall of Lord Konda takes them all back at once, still goaded, so they swing every turn. It returns Jinxed Idol too, but you can sacrifice a creature to pass it on again.

The first upgrades, once you want to spend more: Ephemerate and Teleportation Circle blink Dack more cheaply and more often, and Ghostly Prison keeps the creatures you didn't give away from swinging at you.