Not being able to counter the creature is another bonus
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Aether Syphon Baxter, Fly in the Ointment Burlfist Oak Chasm Skulker Clinquant Skymage Diviner's Wand Dream Trawler Hoofprints of the Stag Horizon Chimera Human Torch, Johnny Storm Iron Man, Armored Avenger Jace's Erasure Jace's Projection Kianne, Corrupted Memory Lorescale Coatl Lyla, Holographic Assistant Moonring Mirror Nadir Kraken Niv-Mizzet, Parun Niv-Mizzet, the Firemind Ominous Seas Oneirophage Psychic Corrosion Psychic Network Psychosis Crawler Queza, Augur of Agonies Shabraz, the Skyshark Shang-Chi and the Ten Rings Sheoldred, the Apocalypse Sliv-Mizzet, Hivemind (playtest) Sphinx's Tutelage Stark's Ingenuity Starscream, Power Hungry Starving Revenant Teferi's Talent Teferi's Tutelage Teferi, Hero of Dominaria Teferi, Temporal Pilgrim Temmet, Naktamun's Will The Astonishing Ant-Man The Locust God The Watcher in the Water Tolarian Kraken Toothy, Imaginary Friend Vodalian Wave-Knight Wizard Class
In truth, I think of them more as the face of chaos decks than any other general
The downside is that you can only do it once per pack - after that, you know what youve got, so its far less entertaining