Akiri, Line-Slinger Akroma, Vision of Ixidor Alena, Kessig Trapper Alharu, Solemn Ritualist Alisaie Leveilleur Alphinaud Leveilleur Amy Pond Anara, Wolvid Familiar April O'Neil, Live on the Scene Ardenn, Intrepid Archaeologist Armix, Filigree Thrasher Bebop, Skull & Crossbones Blaring Captain Blaring Recruiter Blue, Loyal Raptor Brallin, Skyshark Rider Breeches, Brazen Plunderer Brinelin, the Moon Kraken Bruse Tarl, Boorish Herder Bruse Tarl, Boorish Herder Cazur, Ruthless Stalker Chakram Retriever Chakram Slinger Dargo, the Shipwrecker Donatello, the Brains Eligeth, Crossroads Augur Esior, Wardwing Familiar Evie Frye Falthis, Shadowcat Familiar Francisco, Fowl Marauder Frodo, Adventurous Hobbit Ghost of Ramirez DePietro Gilanra, Caller of Wirewood Glacian, Powerstone Engineer Gorm the Great Halana, Kessig Ranger Haldan, Avid Arcanist Ich-Tekik, Salvage Splicer Ikra Shidiqi, the Usurper Impetuous Protege Ishai, Ojutai Dragonspeaker Ishai, Ojutai Dragonspeaker Jacob Frye Jenny Flint Jeska, Thrice Reborn Kamahl, Heart of Krosa Kamber, the Plunderer Kediss, Emberclaw Familiar Keleth, Sunmane Familiar Keskit, the Flesh Sculptor Khorvath Brightflame Kodama of the East Tree Krark, the Thumbless Kraum, Ludevic's Opus Kraum, Ludevic's Opus Krav, the Unredeemed Kydele, Chosen of Kruphix Laurine, the Diversion Leonardo, the Balance Ley Weaver Livio, Oathsworn Sentinel Lore Weaver Ludevic, Necro-Alchemist Madame Vastra Malcolm, Keen-Eyed Navigator Merry, Warden of Isengard Miara, Thorn of the Glade Michelangelo, the Heart Mothers Yamazaki (playtest) Nadier, Agent of the Duskenel Nikara, Lair Scavenger Numa, Joraga Chieftain

(That creature returns under its owner's control.) Whenever this creature attacks, you may exile target creature defending player controls until this creature leaves the battlefield
It prevents opponents from casting spells at instant speed, making it difficult for them to respond to your plays
The more control and stall cards you have the better these are as well simply due to increased chance of getting to cast them
We get the chain started with cards like Roaring Primadox and Stampeding Wildebeests, and then get repeated value out of the first two, who trigger when they leave the battlefield