Argentum Armor [Commander 2017] Dog Shaman It can't block as long

It can't block as long as it has a +1/+1 counter on it

Set: Hour of Devastation Type: Creature — Spider Rarity: Uncommon Cost: {1}{B}{G} Reach

Set: Rise of the Eldrazi Type: Creature — Human Warrior Rarity: Common Cost: {B} Level up {4} ({4}: Put a level counter on this

Set: Magic 2015 Type: Legendary Planeswalker — Nissa Rarity: Mythic Cost: {3}{G}{G} +1: Target land you control becomes a 4/4 Elemental creature with trample

Set: Invasion Type: Sorcery Rarity: Rare Cost: {1}{B} Choose a card name other than a basic land card name

Argentum Armor [Commander 2017] Dog Shaman It can't block as longSet: Commander 2017 Type: Artifact Equipment Rarity: Rare Cost: {6} Equipped creature gets +6 +6. Whenever equipped creature attacks, destroy target permanent. Equip {6} Mirrodin's creator still lives, still shapes metal, and still commands world shaking power.