In some situations, it may be better to wait until you can cast the more expensive side , as then youll have an opportunity to benefit from its effect before its blown up, rather than hoping to unlock it later and it scaring your opponent into action
Abomination of Llanowar Armaggon, Future Shark Arvinox, the Mind Flail Atraxa, Praetors' Voice Bruna, the Fading Light Captain N'ghathrod Drivnod, Carnage Dominus Gallowbraid Gisela, the Broken Blade Gollum, Obsessed Stalker Gollum, Patient Plotter Gollum, Scheming Guide Grakmaw, Skyclave Ravager Grazilaxx, Illithid Scholar Greel, Mind Raker K'rrik, Son of Yawgmoth K'rrik, Son of Yawgmoth Kraum, Ludevic's Opus Kraum, Ludevic's Opus Kraum, Violent Cacophony Krothuss, Lord of the Deep Madame Hydra, Reanimated Mondrak, Glory Dominus Morinfen Nihiloor Obosh, the Preypiercer Old Stickfingers Sauron, Lord of the Rings Sauron, the Dark Lord Sauron, the Lidless Eye Sauron, the Necromancer Smagol, Helpful Guide Solphim, Mayhem Dominus Tekuthal, Inquiry Dominus Thalia and The Gitrog Monster The Gitrog Monster The Gitrog, Ravenous Ride The Master of Keys Toxrill, the Corrosive Tsabo Tavoc Uchbenbak, the Great Mistake Umbris, Fear Manifest Yarok, the Desecrated Zellix, Sanity Flayer Zopandrel, Hunger Dominus
While looking for issues with your card, I highly recommend copying my Pokemon Grading Spreadsheet here
Maybe you have some direct damage to finish off a weakened creature
