As an additional cost to cast this spell, sacrifice a creature.
Search your library for a creature card with converted mana cost X or less, where X is 2 plus the sacrificed creature's converted mana cost. Put that card onto the battlefield, then shuffle your library. Exile Eldritch Evolution.

, Sacrifice Emrakul's Evangel and any number of other non-Eldrazi creatures: Create a 3/2 colorless Eldrazi Horror creature token for each creature sacrificed this way.

Whenever you cast an Eldrazi creature spell with converted mana cost 7 or greater, draw two cards.

This spell costs less to cast for each card type among cards in your graveyard.
When you cast this spell, you gain control of target opponent during that player's next turn. After that turn, that player takes an extra turn.
Flying, trample, protection from instants

When Enlightened Maniac enters the battlefield, create a 3/2 colorless Eldrazi Horror creature token.

Whenever Erupting Dreadwolf attacks, it deals 2 damage to any target.

You may cast Eternal Scourge from exile.
When Eternal Scourge becomes the target of a spell or ability an opponent controls, exile Eternal Scourge.

Eldrazi you control have vigilance.
, , Sacrifice a non-Eldrazi creature: Create a 3/2 colorless Eldrazi Horror creature token.

When Extricator of Sin enters the battlefield, you may sacrifice another permanent. If you do, create a 3/2 colorless Eldrazi Horror creature token.
Delirium — At the beginning of your upkeep, if there are four or more card types among cards in your graveyard, transform Extricator of Sin.

When Exultant Cultist dies, draw a card.

Enchant creature you control
When Faith Unbroken enters the battlefield, exile target creature an opponent controls until Faith Unbroken leaves the battlefield.
Enchanted creature gets +2/+2.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Vigilance
Fibrous Entangler must be blocked if able.
Fibrous Entangler can block an additional creature each combat.

Whenever Fiend Binder attacks, tap target creature defending player controls.

Flying
Wizards you control get +2/+1 and have flying.
Whenever you cast an instant or sorcery spell, create a 1/1 blue Human Wizard creature token.

Skulk (This creature can't be blocked by creatures with greater power.)
When Fogwalker enters the battlefield, target creature an opponent controls doesn't untap during its controller's next untap step.

Target opponent looks at the top four cards of your library and separates them into a face-down pile and a face-up pile. Put one pile into your hand and the other into your graveyard.

When Foul Emissary enters the battlefield, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
When you sacrifice Foul Emissary while casting a spell with emerge, create a 3/2 colorless Eldrazi Horror creature token.