For a while it was a strong 4-of in the Burn/Swiftspear decks but that's dropped off with the banning of Swiftspear
Secret Lair x Dungeons & Dragons: Shadows Over Baldurs Gate Grim Hireling (137k decks, EA $20) Wild-Magic Sorcerer (81k decks, EA $13) Xorn (135k decks, Ampersand foil $30, SLD $14) Prosper, Tome-Bound (12k as Commander, 41k as card, EA $18) Another favorite theme for SLs is popular Commander plus some strong helpers and this is perfectly Prosper
Drawing a lot of cards is something that can really flip a game on its head, especially since it relies on your opponents drawing cards and attacking to give you value
Steel - Can chip, break, and sculpt ice
It has two alternate forms
Koma can sacrifice Serpents to tap a permanent and shut off its activated abilities or to give itself indestructible, giving practical use for Koma's Coil tokens in-game