Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

, , Discard a card: Destroy target Wall.

At the beginning of each end step, each player who tapped a land for mana this turn sacrifices a land. Desolation deals 2 damage to each player who sacrificed a Plains this way.

Non-Eye creatures you control can't attack.
Evil Eye of Orms-by-Gore can't be blocked except by Walls.

Destroy target creature that was dealt damage this turn. It can't be regenerated.

Choose a card name, then target opponent mills a card. If a card with the chosen name was milled this way, you draw a card.
Draw a card at the beginning of the next turn's upkeep.

When Hecatomb enters the battlefield, sacrifice Hecatomb unless you sacrifice four creatures.
Tap an untapped Swamp you control: Hecatomb deals 1 damage to any target.

: Exile the bottom card of target player's graveyard.
, Sacrifice Phyrexian Furnace: Exile target card from a graveyard. Draw a card.

Rushwood Grove enters the battlefield tapped.
: Put a storage counter on Rushwood Grove.
, Remove any number of storage counters from Rushwood Grove: Add for each storage counter removed this way.

When Tar Pit Warrior becomes the target of a spell or ability, sacrifice it.

Exile the top three cards of your library face down. You may look at those cards for as long as they remain exiled. Until your next turn, you may play those cards. At the beginning of your next upkeep, put any of those cards you didn't play into your graveyard.

At the beginning of your upkeep, put a time counter on Time Bomb.
, , Sacrifice Time Bomb: Time Bomb deals damage equal to the number of time counters on it to each creature and each player.

Simultaneously, all phased-out creatures phase in and all creatures with phasing phase out.

: Tap target artifact you don't control.