Horn of Greed

Whenever a player plays a land, that player draws a card.

Phyrexian Tower

{T}: Add {C}.
{T}, Sacrifice a creature: Add {B}{B}.

Flying
At the beginning of your upkeep, each opponent draws a card.

At the beginning of each player's draw step, that player draws two additional cards.

Whenever an opponent loses life, that player mills that many cards. (Damage causes loss of life.)

{T}: Put a charge counter on Otherworld Atlas.
{T}: Each player draws a card for each charge counter on Otherworld Atlas.

Deathtouch
Whenever you draw a card, you gain 2 life.
Whenever an opponent draws a card, they lose 2 life.