Quag Sickness 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
Enchant creature Enchanted creature gets -1/-1 for each Swamp you control.
How it works : Quag Sickness
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
This ability counts the number of Swamps controlled by Quag Sickness’s controller, not the enchanted creature’s controller (in case they’re different players).
No other card is named in this ruling.
- #2· Wizards of the Coast
This bonus is not fixed; it changes as the number of Swamps you control changes.
No other card is named in this ruling.
- #3· Wizards of the Coast
The ability cares about lands with the land type Swamp, not necessarily lands named Swamp.
No other card is named in this ruling.
Legal formats
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Meta decks with Quag Sickness
No archived Top 8 deck with this card yet.




