Seedborn Muse Untap everything, every turn One of the hardest decisions you have to make in Commander is deciding when to attack and leave yourself with fewer defences
It's also in colorless so any color has access to it

Arlinn Kord Be'lakor, the Dark Master Children of Korlis Eladamri, Korvecdal Elas il-Kor, Sadistic Pilgrim Henchfiend of Ukor Hickory Woodlot Hokori, Dust Drinker Infiltrator il-Kor Invasion of Ikoria Kor Aeronaut Kor Blademaster Kor Bladewhirl Kor Cartographer Kor Castigator Kor Celebrant Kor Chant Kor Dirge Kor Duelist Kor Entanglers Kor Firewalker Kor Halberd Kor Haven Kor Hookmaster Kor Line-Slinger Kor Outfitter Kor Sanctifiers Kor Scythemaster Kor Sky Climber Kor Skyfisher Kor Spiritdancer Korlash, Heir to Blackblade Korlessa, Scale Singer Kormus Bell Korozda Gorgon Korozda Guildmage Korozda Monitor Korvold and the Noble Thief Korvold, Fae-Cursed King Korvold, Gleeful Glutton Lancers en-Kor Loch Korrigan Looter il-Kor Martyrs of Korlis Mikokoro, Center of the Sea Nomads en-Kor Outrider en-Kor Shaman en-Kor Skorpekh Destroyer Skorpekh Lord Spirit en-Kor Survivor of Korlis Warrior en-Kor Wasitora, Nekoru Queen Yukora, the Prisoner Zilortha, Apex of Ikoria

The card distills an iconic aspect of FINAL FANTASYan encounter with a crystal and the determination of young heroes to save the world