Kormus Bell

All Swamps are 1/1 black creatures that are still lands.

30th Anniversary Edition

Masters Edition IV

All Swamps are 1/1 creatures that are still lands.

Fourth Edition Foreign Black Border

Fourth Edition

All swamps become 1/1 black creatures. The swamps still count as lands but cannot be tapped for mana the turn they come into play.

It affects Swamps controlled by any and all players.

The lands are both lands and creatures at the same time. They are affected by anything that affects either permanent type.

A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.