Primordial Wurm is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Complete guide
Primordial Wurm is a classic example of a high-impact creature that relies solely on its massive physical presence to dominate the battlefield. As a vanilla creature, it offers pure power and toughness without the complexity of additional abilities or triggers.
What It Does
Primordial Wurm is a 7/6 creature for six mana. It does not have any keyword abilities, triggered abilities, or activated abilities. Its primary role in a game is to serve as a high-stature threat that can block large attackers or threaten to end the game in a few swings.
Phase by Phase Resolution
When you cast Primordial Wurm, it goes onto the stack like any other creature spell. Once it resolves, it enters the battlefield. Because it lacks 'Haste,' it will be affected by summoning sickness and cannot attack or use abilities with the tap symbol until you begin a turn with it under your control. It simply sits on the board as a 7/6 body.
When to Play It
You should play Primordial Wurm when you need to stabilize the board against smaller ground creatures or when you have an opening to pressure your opponent's life total. Since it has no protection, it is best played when your opponent is low on removal spells or after you have established a mana advantage.
Common Mistakes
A common mistake is forgetting that Primordial Wurm lacks 'Trample.' Despite its size, it can be blocked and completely neutralized for a turn by a single 1/1 token. Additionally, players sometimes forget that it must survive until their next turn to attack unless they provide it with a way to gain Haste.
Interaction examples
If you have Avenger of Zendikar on the battlefield, you have a swarm of 0/1 Plants. Casting Primordial Wurm provides the raw power the Plants lack. While your opponent might use a removal spell on the Wurm, doing so leaves them vulnerable to the army of Plants, and vice versa.
With Seedborn Muse in play, your permanents untap during every player's untap step. This allows you to attack with Primordial Wurm on your turn and have it untap on your opponent's turn. This effectively turns the Wurm into a permanent 7/6 shield, capable of blocking almost any ground attacker your opponent sends your way.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Primordial Wurm
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Legal formats
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Meta decks with Primordial Wurm
No archived Top 8 deck with this card yet.



Avenger of Zendikar
Seedborn Muse