The Eldrazi are a type of Lovecraftian horror creature in Magic: The Gathering first introduced back in Rise of the Eldrazi. They have no color alignment and feature many abilities unique to the Eldrazi not seen since. They have become one of the more infamous creatures in Magic, mostly due to the three titan Eldrazi. These three titans - Emrakul, Kozilek, and Ulamog - are featured in some of the strongest cards in Magic history.
It's unknown if the Eldrazi are truly gone for good, as they exist outside the planes they physically travel. Only time will tell if they will appear again one day to cause havoc on another plane.
10 Spawnsire Of Ulamog
While it may not be the best Eldrazi card, Spawnsire of Ulamog is certainly one of the most enjoyable to play with. Coming in at 7/11 and costing ten mana, Spawnsire of Ulamog is a monster on the playing field. This card also features the annihilator mechanic which is unique to the Eldrazi. It requires a defending opponent to sacrifice as many permanents as indicated with the ability when attacked. Spawnsire has annihilator 1, so the defending player must sacrifice one permanent before declaring their blockers.
Then there's the 20, mana ability on this card that allows you to cast all Eldrazi cards you own outside the game without paying their mana costs. If your sideboard is full of creatures you can put them all down, or if you're playing kitchen table with friends you can just throw your entire collection down for good measure.
9 Sire Of Stagnation
Sire of Stagnation may have colors in its cost, but it is still a colorless creature thanks to Devoid, another ability unique to the Eldrazi. Devoid makes a card simply have no color, no matter what it may take to cast it.
As is common with the Eldrazi, Sire of Stagnation is a beefy card coming in at 5/7. It also features a great ability in that whenever an opponent plays a land, they must exile the top two cards of their library while you draw two cards. With the very large mana costs some Eldrazi have, it never hurts to be able to try and draw that extra land.
8 Conduit Of Ruin
One of the cheaper Eldrazi cards to cast, all while still costing six mana, Conduit of Ruin is a must-include in any Eldrazi deck.
When cast, Conduit of Ruin allows you to search your library for any colorless creature card with a converted mana cost of seven or greater and put it on the top of your library. Since almost all Eldrazi are colorless, except a very select few, you can search your deck for any big Eldrazi you desire.
It doesn't end there either, as the first creature spell you cast at the beginning of every turn has its mana cost reduced by two, thanks to Conduit of Ruin. With how big the mana costs can be with some Eldrazi, any shortcut is helpful.
7 It That Betrays
It That Betrays costs a staggering 12 mana to cast, but its upsides are worth it. It comes in at 11/11 and features annihilator 2. All while having an ability that all non token permanents sacrificed by your opponents come back to the battlefield under your control. Meaning every time you attack with It That Betrays, you're stealing two permanents away from your opponent.
If you wanted to get diabolical with it, you could play All Is Dust and take control of every single colored non land permanent your opponents control.
6 Emrakul, The Promised End
Here we have the first of the Eldrazi titan cards, Emrakul, the Promised End. Although power this great doesn't come cheap, costing you 13 mana to cast, unless you take advantage of its mana-reducing ability. Coming in at 13/13 with flying, trample, and protection from instants is only the tip of the iceberg.
When you cast Emrakul, the Promised End you then take control of your opponent's next turn, allowing you to completely destroy everything they have planned. Attack with all their creatures, sacrifice permanents of value and do whatever you want to cause absolute chaos.
5 Ulamog, The Infinite Gyre
The second of the three Eldrazi titans, Ulamog, the Infinite Gyre comes with so many abilities it's hard to keep track, a trend that all the Eldrazi titans follow.
When you cast you may destroy target permanent. Sprinkle in some evasion in the form of indestructible and the card just keeps getting stronger. Add a dash of annihilator 4 and wow. You've got the recipe for one very powerful Magic card.
4 Kozilek, Butcher Of Truth
The last of the titans, Kozilek, Butcher of Truth just edges out Ulamog, the Infinite Gyre in being a more efficient creature card to cast.
Only costing ten mana but coming in at 12/12 Kozilek features much of the same abilities of Ulamog, the Infinite Gyre. However, the lower mana cost and bigger stats are too hard to pass up.
Kozilek also has you draw four cards upon his casting, allowing you to gain an even stronger advantage than you already have with him on the board.
3 Kozilek, The Great Distortion
Did you think we were done with the three Eldrazi titans? Not even close.
Kozilek, the Great Distortion is the second and much stronger card for the titan and features a mana cost unique to the Eldrazi. To cast Kozilek, the Great Distortion you must use two colorless mana - either from creatures that supply it or by having Wastes in your deck. That makes playing this card trickier than the others.
When cast, if you have less than seven cards in your hand you may draw as many cards as you need to get back to seven. A very strong ability if you have no cards in hand. Then comes the ability to discard any card with a converted mana cost equal to that of one your opponent cast to counter it. If you can keep a steady supply of cards in hand, you can answer almost anything your opponent can throw at you.
2 Ulamog, The Ceaseless Hunger
Ulamog, the Ceaseless Hunger is one of the most brutal creature cards in MTG history.
Costing ten mana and coming in at 10/10 with indestructible isn't even what makes it so oppressive. Whenever you attack with it, the defending player must exile the top 20 cards of their library. That means in the late game it may only take two turns to leave your opponent with no cards left in their library and secure the win.
1 Emrakul, The Aeons Torn
This is, not only the most powerful Eldrazi card but one of the most powerful Magic cards ever printed. So powerful in fact that it has been banned in the Commander format.
Emrakul, the Aeons Torn is one of the highest mana costing cards, coming in at 15 mana, but once you cast it you essentially win the game outright.
This card cannot be countered by any means and has protection against all colors. Plus when you cast it you get to take an extra turn, which allows you to attack before your opponent has an answer, of which there are very few. It also has flying and annihilator 6 because you just need to rub some salt in the wound.