Pact of the Serpent 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.
Official card text
Choose a creature type. Target player draws X cards and loses X life, where X is the number of creatures they control of the chosen type.
Complete guide
Pact of the Serpent is a high-risk, high-reward sorcery that turns tribal board presence into raw card advantage. Whether you are fueling your own hand or forcing an opponent to draw their final cards, this spell scales powerfully with the size of your army.
Understanding the Pact
Pact of the Serpent allows you to choose a creature type and forces a target player to draw cards and lose life equal to the number of creatures of that type they control. This effect is mandatory once the spell resolves, meaning you must count every creature of the chosen type, even if the life loss would result in a player losing the game.
Resolution Step-by-Step
When you cast the spell, you first select the target player. You do not name the creature type yet; this keeps your opponents in the dark about your specific plans. Upon resolution, you choose an existing creature type like 'Zombie' or 'Elf'. You then count the creatures of that type the target player controls at that exact moment to determine X. Finally, that player draws X cards and loses X life simultaneously.
Common Pitfalls
A common mistake is trying to name a non-creature type such as 'Artifact' or 'Legendary'; you must pick a valid subtype from the official list of creature types. Additionally, remember that because X is determined upon resolution, if an opponent removes creatures in response to the spell, the value of X will decrease accordingly.
Strategic Timing
While often used on yourself to refill your hand, Pact of the Serpent can be a lethal finisher against opponents playing 'go-wide' tribal decks. If an opponent has a massive army, you can target them to force a life loss total that exceeds their remaining health.
Interaction examples
If you have a board full of creatures but lack the resources to finish the game, use Demonic Tutor to search your library for Pact of the Serpent. Once cast, you can target yourself and choose your most populous creature type to draw the specific cards you need to win.
If you are low on life and fear that casting Pact of the Serpent on yourself will be fatal, you might first use Toxic Deluge to clear some of your own creatures. By reducing your own creature count before Pact of the Serpent resolves, you lower the value of X, allowing you to draw a smaller, safer number of cards without losing all your life.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Pact of the Serpent
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
You choose the target player as you cast Pact of the Serpent, but you don't choose the creature type until the spell resolves.
No other card is named in this ruling.
- #2· Wizards of the Coast
You must choose an existing creature type, such as Squirrel or Knight. You can't choose card types (e.g., artifact) or supertypes (e.g., snow).
No other card is named in this ruling.
- #3· Wizards of the Coast
The value of X is based on the number of creatures the player controls of the chosen type as Pact of the Serpent resolves.
No other card is named in this ruling.
Legal formats
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Meta decks with Pact of the Serpent
No archived Top 8 deck with this card yet.



Demonic Tutor
Toxic Deluge