The coolest cards tend to be the ones where the art communicates scale: where you can feel the weight of an Emperor, the inevitability of an Admiral, or the chaos of a Supernova at their peak

Creatures Valgavoth, Harrower of Souls The Lord of Pain Persistent Constrictor Barbflare Gremlin Gleeful Arsonist Star Athlete Mogis, God of Slaughter Braids, Arisen Nightmare Fate Unraveler Kederekt Parasite Massacre Girl Massacre Wurm Nightshade Harvester Brash Taunter Combustible Gearhulk Harsh Mentor Rampaging Ferocidon Tectonic Giant Florian, Voldaren Scion Kaervek the Merciless Rakdos, Lord of Riots Stormfist Crusader Vial Smasher the Fierce Solemn Simulacrum Fear of Burning Alive Blood Seeker Blood Artist Falkenrath Noble Gray Merchant of Asphodel Morbid Opportunist Syr Konrad, the Grim Kardur, Doomscourge Mayhem Devil Sorceries Sadistic Shell Game Decree of Pain Blasphemous Act Grab the Prize Feed the Swarm Sign in Blood Light Up the Stage Instants Suspended Sentence Bedevil Chaos Warp Blood Pact Infernal Grasp Rakdos Charm Enchantments Spiked Corridor // Torture Pit Enchanter's Bane Spiteful Visions Theater of Horrors Bastion of Remembrance Artifacts Sance Board Mask of Griselbrand Basilisk Collar Arcane Signet Lightning Greaves Sol Ring Fellwar Stone Mind Stone Rakdos Signet Talisman of Indulgence Thought Vessel Lands Blackcleave Cliffs Canyon Slough Dragonskull Summit Exotic Orchard Foreboding Ruins Graven Cairns Shadowblood Ridge Shivan Gorge Smoldering Marsh Spinerock Knoll Sulfurous Springs Temple of Malice Witch's Clinic Terramorphic Expanse Command Tower Ash Barrens Bloodfell Caves Evolving Wilds Geothermal Bog Leechridden Swamp Tainted Peak Temple of the False God 8 Swamp 8 Mountain Tokens Human Soldier // Scarecrow token 9 Devil // Scarecrow tokens Scheme cards When Will You Learn

Laws synergy with Yellow leaders and ability to stabilize mid-game make him a versatile tool in competitive matches
Honestly if you need consistent early-turn mana acceleration in a color other than green, I'd just play Sphere of the Suns
The Pokemon Company does not publish official pull rates for Japanese sets