Nekrataal
{2}{B}{B}
Creature -- Human Assassin
2/1
First strike
When ~this~ enters, destroy target nonartifact, nonblack creature. That creature can't be regenerated.
Parallax Dementia
{1}{B}
Enchantment -- Aura
Enchant creature
Fading 1 (~this~ enters with one fade counter on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
Enchanted creature gets +3/+2.
When ~this~ leaves the battlefield, destroy enchanted creature. That creature can't be regenerated.
Stormscape Battlemage
{2}{U}
Creature -- Metathran Wizard
2/2
Kicker {W} and/or {2}{B} (You may pay an additional {W} and/or {2}{B} as you cast ~this~.)
When ~this~ enters, if it was kicked with its {W} kicker, you gain 3 life.
When ~this~ enters, if it was kicked with its {2}{B} kicker, destroy target nonblack creature. That creature can't be regenerated.