4 Oct 2004
The swamps are counted on resolution.
15 Aug 2010
The amount of damage dealt to a creature is not bounded by its toughness, and the amount of damage dealt to a player is not bounded by that player's life total. For example, if Corrupt deals 6 damage to a 2/2 creature, you'll gain 6 life.
15 Aug 2010
The life you gain is equal to the damage dealt by Corrupt, not necessarily to the number of Swamps you control (if some or all of the damage is prevented, for example).
1 Jul 2013
Corrupt counts any land you control with the subtype Swamp, not just ones named Swamp.
14 Oct 2022
Corrupt counts any land you control with the subtype Swamp, not just ones named Swamp.