It's possible for a Champion's Helm you control to be attached to a creature an opponent controls (if an opponent gains control of your equipped creature, for example). In this case, the creature couldn't be the target of spells or abilities you control, as you are an opponent of the controller of the creature with hexproof.
Last observed on Scryfall 2 months ago at $4.17. Over the trailing 90 days the price moved between $0.39 and $4.89 across 105 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from CMM — the lineup includes Borderless alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #654 of *Commander Masters*, the set that shipped alongside the August 2023 Commander Masters release.
Card type: Artifact — Equipment, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {3} (3 converted). Keyword abilities: Equip.
Legal in Legacy, Vintage, Commander, Brawl, and Historic.
EDHrec ranks this card #800 in Commander, putting it in the common-include tier of the format's playable pool.
Illustrated by Paolo Parente. Rarix catalogs 572 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Paolo Parente
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
