Adaptive Sporesinger Armored Scrapgorger Atraxa, Grand Unifier Atraxa, Grand Unifier Atraxa, Praetors' Voice Belbe, Corrupted Observer Blight Mamba Blightsower Thallid Blightwidow Bloated Contaminator Branchblight Stalker Brutalizer Exarch Burnished Dunestomper Cankerbloom Chancellor of the Tangle Chrome Host Hulk Cinderslash Ravager Contagious Vorrac Contaminant Grafter Converter Beast Copper Host Crusher Copper Longlegs Cystbearer Death-Hood Cobra Defiler of Vigor Elvish Vatkeeper Etali, Primal Sickness Evolved Spinoderm Evolving Adaptive Ezuri, Claw of Progress Ezuri, Stalker of Spheres Glissa Sunslayer Glissa's Courier Glissa's Retriever Glissa, Herald of Predation Glissa, the Traitor Glistener Elf Ich-Tekik, Salvage Splicer Ichorspit Basilisk Ixhel, Scion of Atraxa Lattice-Blade Mantis Malady Invoker Maul Splicer Migloz, Maze Crusher Mycosynth Fiend Necrogen Rotpriest Oil-Gorger Troll Omnath, Locus of All Paladin of Predation Phyrexian Hydra Phyrexian Swarmlord Plague Nurse Plaguemaw Beast Plated Kilnbeast Polukranos, Engine of Ruin Predation Steward Putrefax Quilled Slagwurm Rot Wolf Rotted Hystrix Rustvine Cultivator Skyclave Invader Skyscythe Engulfer Slaughter Singer Spinebiter Tainted Observer Tangle Angler Tel-Jilad Fallen Thundering Tanadon Tyrranax Atrocity Tyrranax Rex Venerated Rotpriest

It added a lot of complexity that was phased out between Revised and Sixth Edition , now only remaining on three cards as part of their design: Winter Orb, Chaos Orb, and Howling Mine
When Skullclamp first showed up on the scene, it was feared, but the format seemed to adjust
That means spells like Lightning Bolt, Chaos Warp, or Vandalblast get a second life, no mana needed
A goblin one next please