Getting a read on what is being passed to you is often extremely difficult, and it will likely be some time before you become good at it
Its surprisingly cheap, too, with both the upfront cost and flashback cost being less than I would expect

Synthoids Abdel Adrian, Gorion's Ward Ad Nauseam Adaptive Sporesinger Adventurer's Airship Aerial Formation Aetherborn Marauder Aetherflux Conduit Aethersphere Harvester Aetherwing, Golden-Scale Flagship Agadeem's Awakening Agent Frank Horrigan Air Response Unit Ajani's Presence Ajani, Outland Chaperone Alacrian Jaguar Amethyst Dragon Amethyst Dragon Aminatou, Veil Piercer Ancestral Knowledge Ancient Brass Dragon Angel of Salvation Angelic Aberration Another Round Ao, the Dawn Sky Apex Hawks Apocalypse Runner Appa, Steadfast Guardian April O'Neil, Kunoichi Trainee Aradara Express Arc Lightning Arc Mage Arcane Bombardment Arco-Flagellant Ardenn, Intrepid Archaeologist Armed and Armored Armory Automaton Arrow Volley Trap Arsenal Thresher Artisan's Sorrow Atlantis Attacks Atomize Atraxa, Praetors' Voice Augury Owl Augusta, Dean of Order Aurelia's Fury Aurora Awakener Autarch Mammoth Automatic Librarian Avacyn's Judgment Avatar of Hope Awaken the Blood Avatar Ayesha Tanaka, Armorer Balamb Garden, Airborne Ballista Charger Baron Helmut Zemo Barrel Down Sokenzan Batroc the Leaper Battalion Foot Soldier Battle for Bretagard Battlefield Improvisation Beast Mode Beatrix, Loyal General Berserker's Frenzy Bespoke Battlewagon Bessie, the Doctor's Roadster Better Than One Biblioplex Kraken Big Wheel Bilbo, Birthday Celebrant Bioshift Black Mana Battery

Your typical Fiend Hunter has a downside as your opponent gets their permanent back if it dies