Quag Sickness
Magic 2011 — common
Enchantment — Aura
Quag Sickness rulings:
2010-08-15: 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).
2010-08-15: This bonus is not fixed; it changes as the number of Swamps you control changes.
2010-08-15: The ability cares about lands with the land type Swamp, not necessarily lands named Swamp.