Myrel, Shield of Argive's first ability prevents opponents from activating abilities of permanents on the battlefield that are artifacts, creatures, and/or enchantments. It doesn't prevent activated abilities from cards in any zone other than the battlefield. Notably, this means that your opponents may still activate abilities of cards in their graveyard (such as unearth).
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities (such as equip and unearth) are activated abilities and will have colons in their reminder text.
This printing is one of 3 catalogued treatments from PRM — the lineup includes Foil and Nonfoil 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.
This card belongs to *Magic Online Promos* (released March 2023).
Card #105644 in Magic Online Promos.
Rarity tier: mythic. Mythic rares historically land in roughly one out of every eight boosters at standard print densities.
Card type: Legendary Creature — Human Soldier. Color identity: white. Mana cost: {3}{W} (4 converted).
Legal in Duel, Brawl, Legacy, Modern, Pioneer, and Vintage.
EDHrec ranks this card #1,498 in Commander, putting it in the common-include tier of the format's playable pool.
Illustrated by Ryan Pancoast.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Ryan Pancoast
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
