Aether Syphon Baxter, Fly in the Ointment Burlfist Oak Chasm Skulker Clinquant Skymage Diviner's Wand Dream Trawler Hoofprints of the Stag Horizon Chimera Human Torch, Johnny Storm Iron Man, Armored Avenger Jace's Erasure Jace's Projection Kianne, Corrupted Memory Lorescale Coatl Lyla, Holographic Assistant Moonring Mirror Nadir Kraken Niv-Mizzet, Parun Niv-Mizzet, the Firemind Ominous Seas Oneirophage Psychic Corrosion Psychic Network Psychosis Crawler Queza, Augur of Agonies Ravenhill Flock Shabraz, the Skyshark Shang-Chi and the Ten Rings Sheoldred, the Apocalypse Sliv-Mizzet, Hivemind (playtest) Sphinx's Tutelage Stark's Ingenuity Starscream, Power Hungry Starving Revenant Teferi's Talent Teferi's Tutelage Teferi, Hero of Dominaria Teferi, Temporal Pilgrim Temmet, Naktamun's Will The Astonishing Ant-Man The Locust God The Watcher in the Water Tolarian Kraken Toothy, Imaginary Friend Vodalian Wave-Knight Wizard Class

A scaling anthem that rewards you for having multiple or cheap commanders provides plenty of impact, plus the self-reanimation makes it safe to run out since you can (almost) always get it back
As many mono-green decks already prioritize large creatures, this card gives the player the benefit of not only making their big creatures cheaper but also making them all bigger and giving them trample
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Notes and Rules Information for Oloro, Ageless Ascetic: Oloro, Ageless Ascetic is banned as a commander in Duel Commander format, but it may be part of your deck
Four damage, five damage or even six damage should be enough to clear out most creatures