{T}, Sacrifice this creature: Add {B}{B}.

Flash When this creature enters, target creature an opponent controls gets -2/-2 until end of turn. Remove all counters from that creature.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Exile the top creature card of your graveyard: this creature gets +2/+2 until end of turn.

Rat offering (You may cast this spell any time you could cast an instant by sacrificing a Rat and paying the difference in mana costs between this and the sacrificed Rat. Mana cost includes color.) Whenever a permanent is put into an opponent's graveyard, that player loses 1 life.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

{1}{B}, Sacrifice another creature: Put two +1/+1 counters on this creature. Activate only as a sorcery.

Enchant creature When this Aura is put into a graveyard from the battlefield, destroy target nonblack creature.

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

Any number of target players each discard a number of cards equal to the highest mana value among permanents you control.

Creatures you control gain intimidate until end of turn. (Each of those creatures can't be blocked except by artifact creatures and/or creatures that share a color with it.)