Blastfire Bolt

Blastfire Bolt deals 5 damage to target creature. Destroy all Equipment attached to that creature.

Festergloom

Nonblack creatures get -1/-1 until end of turn.

Haste (This creature can attack and {T} as soon as it comes under your control.)

Enchant creature
Enchanted creature gets -2/-2.
At the beginning of the upkeep of enchanted creature's controller, that player loses 2 life.

Destroy target creature. It can't be regenerated.

When Gravedigger enters, you may return target creature card from your graveyard to your hand.

Enchant land
Enchanted land has "{T}: Target player loses 3 life."

Flying
At the beginning of your upkeep, draw a card unless target opponent sacrifices a creature of their choice or pays 3 life.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Carrion Crow enters tapped.

Heat Ray deals X damage to target creature.

Cone of Flame deals 1 damage to any target, 2 damage to another target, and 3 damage to a third target.

{R}, Sacrifice Torch Fiend: Destroy target artifact.

{2}{B}: Zof Shade gets +2/+2 until end of turn.

Enchant creature
Enchanted creature has "{T}: This creature deals damage equal to its power to any target."

Defender (This creature can't attack.)
{R}: Wall of Fire gets +1/+0 until end of turn.

Nightfire Giant gets +1/+1 as long as you control a Mountain.
{4}{R}: Nightfire Giant deals 2 damage to any target.

Defender (This creature can't attack.)
{3}: Until end of turn, Gargoyle Sentinel loses defender and gains flying.

Lightning Strike deals 3 damage to any target.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Whenever a creature card is put into an opponent's graveyard from anywhere, you gain 1 life.