You can even pay a little extra to gain a small creature body on top of the exchange, or some other kind of permanent advantage
Eldritch Immunity Eldritch Immunity displays a sneaky amount of flexibility, and both regular and overload modes at a reasonable cost
Aether Chaser Aether Herder Aether Inspector Aether Poisoner Aether Spike Aether Swooper Aether Theorist Aetherstream Leopard Attune with Aether Conduit Goblin Consulate Turret Cyclops Superconductor Die Young Eddytrail Hawk Electrozoa Energy Refractor Galvanic Discharge Glassblower's Puzzleknot Hexgold Slith Highspire Infusion Hightide Hermit Inspired Inventor Inventor's Axe Jolted Awake Live Fast Reservoir Walker Riddle Gate Gargoyle Riparian Tiger Sage of Shaila's Claim Shipwreck Moray Smelted Chargebug Solstice Zealot Spontaneous Artist Tempest Harvester Thriving Grubs Thriving Ibex Thriving Rats Thriving Rhino Thriving Skyclaw Thriving Turtle Tune the Narrative Woodweaver's Puzzleknot
And it has flashback, so you can do it twice
Surely having to pay three mana to do nothing but bring this creature to your hand is bad enough to neuter the poor creatures, right
Well call our familiars to dispose of these corpses: Blade of the BloodchiefBlade of the Bloodchief, BloodghastBloodghast, Butcher of MalakirButcher of Malakir, Dusk Legion ZealotDusk Legion Zealot, Glass-Cast HeartGlass-Cast Heart, Heirloom BladeHeirloom Blade, Kindred BoonKindred Boon, Martyr of DuskMartyr of Dusk, Nighthawk ScavengerNighthawk Scavenger, Oathsworn VampireOathsworn Vampire, Radiant DestinyRadiant Destiny, Sorin, Lord of InnistradSorin, Lord of Innistrad, Temple of the False GodTemple of the False God, Windbrisk HeightsWindbrisk Heights
