Pokemon cards serve as the Pokemon that you will lead in battles
may look modest compared to flashier effects, but the deck turns that small resource refund into a much bigger problem once the right cards start stacking together
Black is the color that typically gets to do everything, but at a cost
If you were in the same scenario but Pit Scorpion was attacking rather than the elf, youd die to combat damage before the trigger to add a poison counter went on the stack

Arcane Maelstrom Commander (1) Planeswalker (1) Creatures (21) Nascent Metamorph Dualcaster Mage Glademuse Haldan, Avid Arcanist Crackling Drake Eon Frolicker Lunar Mystic Murmuring Mystic Niblis of Frost Rashmi, Eternities Crafter Solemn Simulacrum Talrand, Sky Summoner Goblin Dark-Dwellers Pako, Arcane Retriever Xyris, the Writhing Storm Charmbreaker Devils Etali, Primal Storm Melek, Izzet Paragon Wort, the Raidmother Djinn Illuminatus Ravenous Gigantotherium Instants (24) Crop Rotation Artifact Mutation Comet Storm Commune with Lava Evolution Charm Starstorm Strength of the Tajuru Tribute to the Wild Chaos Warp Decoy Gambit Deflecting Swat Frantic Search Harrow Hunter's Insight Natural Connection Temur Charm Channeled Force Chemister's Insight Curious Herd Slice in Twain Clash of Titans Prophetic Bolt Whiplash Trap Hunting Pack Sorcery (1) Enchantments (6) Primal Empathy Psychic Impetus Shiny Impetus Wilderness Reclamation Predatory Impetus Swarm Intelligence Artifacts (7) Sol Ring Arcane Signet Lightning Greaves Bonder's Ornament Commander's Sphere Twinning Staff Lavabrink Floodgates Lands (38) Cinder Glade Command Tower Desolate Lighthouse Exotic Orchard Frontier Bivouac Gruul Turf Halimar Depths Izzet Boilerworks Kessig Wolf Run Mossfire Valley Mosswort Bridge Myriad Landscape Oran-Rief, the Vastwood Rugged Highlands Rupture Spire Scavenger Grounds Simic Growth Chamber Swiftwater Cliffs Thornwood Falls Yavimaya Coast Forest x8 Island x5 Mountain x5 Commander, Theme, and Strategy Kalamax loves a good storm, and what better way to create a storm than with instants

Ureni, the Song Unending $11.01 Dragonlord Atarka saw a lot of play in its Standard era, and it still retains a good chunk of its value as a casual (Cube, EDH) staple, be it as a ramp or reanimator target