Cover of Darkness [Onslaught] Human Druid you may sacrifice an artifact

you may sacrifice an artifact

Set: Alpha Edition Type: Instant Rarity: Common Cost: {X}{W} Prevent the next X damage that would be dealt to any target this turn

"When I grafted the Planar Bridge into myself

Set: Portal Three Kingdoms Type: Sorcery Rarity: Rare Cost: {3}{B} You draw three cards and you lose 3 life

Set: Judge Gift Cards 2013 Type: Creature — Incarnation Rarity: Rare Cost: {4}{G} At the beginning of your upkeep

Cover of Darkness [Onslaught] Human Druid you may sacrifice an artifactSet: Onslaught Type: Enchantment Rarity: Rare Cost: {1}{B} As Cover of Darkness enters the battlefield, choose a creature type. Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and or black creatures.)