Hidden Horror [Classic Sixth Edition]

Hidden Horror [Classic Sixth Edition]Set: Classic Sixth Edition Type: Creature Horror Rarity: Uncommon Cost: {1}{B}{B} When Hidden Horror enters the battlefield, sacrifice it unless you discard a creature card. Lifespans are measured by its dreadful length.

Set: Aether Revolt Type: Creature — Human Artificer Rarity: Uncommon Cost: {3}{R} Double strike (This creature deals both first-strike and regular combat damage

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {0} {T}: Add {U}

Set: Eternal Masters Type: Artifact Rarity: Mythic Cost: {0} At the beginning of your upkeep

Set: Masters 25 Type: Creature — Human Scout Rarity: Uncommon Cost: {3}{W}{U} Flying

Set: Eternal Masters Type: Creature — Drake Rarity: Uncommon Cost: {2}{W}{U} Flash (You may cast this spell any time you could cast an instant

As if there's glitch in the system

Set: Time Spiral Timeshifted Type: Legendary Creature — Elder Dragon Rarity: Rare Cost: {2}{U}{U}{B}{B}{R}{R} Flying

Set: Revised Edition Type: Artifact Rarity: Rare Cost: {3} You may spend white mana as though it were red mana

and to whom it owes the grudge

Set: Gatecrash Type: Creature — Human Advisor Rarity: Uncommon Cost: {W}{B} Sacrifice another creature: Cartel Aristocrat gains protection from the color of your choice until end of turn

Voice of the Argoth forest

Set: Planechase 2012 Type: Enchantment — Aura Rarity: Rare Cost: {3}{G} Enchant creature