Awesome Cyber Monday

Mortivore's power and toughness are each equal to the number of creature cards in all graveyards. {B}: Regenerate Mortivore.

Return target creature card from your graveyard to your hand. Flashback {4}{B} (You may cast this card from your graveyard for its flashback cost. ...

Morbid Hunger deals 3 damage to any target. You gain 3 life. Flashback {7}{B}{B} (You may cast this card from your graveyard for its flashback cost...

Whenever a player discards a card, you may gain 1 life.

When Mindslicer dies, each player discards their hand.

Target player discards X cards, where X is one plus the number of cards named Mind Burst in all graveyards.

{1}{B}{B}, Sacrifice a creature: Return target creature card from your graveyard to your hand.

Discard any number of cards. Target player reveals their hand, then you choose a nonland card from it for each card discarded this way. That player...

Each player sacrifices a creature.

{2}{B}: Infected Vermin deals 1 damage to each creature and each player. Threshold — {3}{B}: Infected Vermin deals 3 damage to each creature and ea...

Target player reveals their hand. That player discards all nonland cards with the same name as another card in their hand.

Exile all cards from target player's graveyard other than basic land cards. For each card exiled this way, search that player's library for all car...

At the beginning of your upkeep, target opponent may exile a card from their graveyard. If that player doesn't, you may draw a card.

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

Target player can't cast creature spells this turn. Draw a card.

Destroy target nonblack creature if its toughness is less than or equal to the number of cards in your graveyard.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Threshold — As long as seven or more cards are in your g...

{B}, Discard a card: Fledgling Imp gains flying until end of turn.

Whenever Filthy Cur is dealt damage, you lose that much life.

{1}{B}, Sacrifice Famished Ghoul: Exile up to two target cards from a single graveyard.

{2}{B}, Discard a card: Face of Fear gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Destroy target white creature. It can't be regenerated. Draw a card.

Search your library for a card and put that card into your graveyard. Then shuffle your library.

Flying