Enchant creature card in a graveyard When this Aura enters, if it's on the battlefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battlefield with this Aura." Return enchanted creature card to the battlefield under your control and attach this Aura to it. When this Aura leaves the battlefield, that creature's controller sacrifices it. Enchanted creature gets -1/-0.

Protection from white {B}: This creature gains first strike until end of turn. {B}{B}: This creature gets +1/+0 until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.) Nightmare's power and toughness are each equal to the number of Swamps you control.

Flying (This creature can't be blocked except by creatures with flying or reach.) Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.

({T}: Add {B} or {G}.)

Whenever this land becomes tapped, it deals 1 damage to you. {T}: Add one mana of any color.

{T}: Add {C}. {1}: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {T}: Target Assembly-Worker creature gets +1/+1 until end of turn.

({T}: Add {W} or {B}.)

Spend only black mana on X. Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

{1}, {T}: Tap target artifact, creature, or land.

{T}: Target creature other than this creature has base power and toughness 0/2 until end of turn.

Flying Whenever this creature deals damage to a player, that player discards a card.

Target player discards two cards at random.

Whenever this creature attacks and isn't blocked, you may sacrifice it. If you do, defending player discards three cards.

{1}, {T}, Sacrifice this artifact: Draw two cards, then put a card from your hand on top of your library.

{B}, Pay 2 life: Draw a card.