The History of Morph in MTG The Sets Morph was first introduced all the way back in 2002 when it appeared as one of the key mechanics in the Onslaught block
We continuously stick to the developmental intent "Technology Excellent, Credit fundamental"

Advanced Search Sets Random Syntax A Killer Among Us Acidic Slime Acidic Slime Ambush Viper Animus of Predation Ankle Biter Aveline de Grandpr Axebane Ferox Bitterblade Warrior Blooming Stinger Bow of Nylea Built Bear (playtest) Bushmaster, Coiled Henchman Daggerback Basilisk Deadly Recluse Death-Hood Cobra Deathbloom Gardener Deathcap Cultivator Deathmist Raptor Dragon Sniper Elvish Warmaster Erinis, Gloom Stalker Fang of Shigeki Fateweaver Feral Appetite Flesh Burrower Formless Genesis Frog Butler Fynn, the Fangbearer Fynn, the Fangbearer Gift of the Viper Gilt-Leaf Ambush Glowing One Gnarlwood Dryad God-Eternal Rhonas Gran Pulse Ochu Greater Basilisk Grist, Voracious Larva Hazardroot Herbalist Heir of the Wilds Hit-Monkey Hoarding Recluse Hornet Nest Hornet Queen Horrid Vigor Hungry Lynx Ichorspit Basilisk Jewel-Eyed Cobra Kappa Tech-Wrecker Kessig Recluse Kraul Stinger Kura, the Boundless Sky Lace with Moonglove Luminollusk Majestic Myriarch Mirkwood Spider Moss Viper Mwonvuli Beast Tracker Narnam Renegade Nightshade Dryad Nightshade Peddler Noxious Newt Oakhame Adversary Ohran Frostfang Ornery Dilophosaur Pestilent Wolf Pharika's Disciple Poison Dart Frog Poison the Blade Printlifter Ooze Questing Beast Radioactive Spider

This means that detecting them is not as simple as it seems
So long as theres no red, you have complete access to any other energy card in the game
If youre interested in making a dual-tribal deck with the bloodsuckers and shambling corpses working alongside each other, Kalitas should definitely be at the top of your list