From the Vault: Realms

Glacial Chasm

Cumulative upkeep—
Pay 2 life.
When Glacial Chasm enters the battlefield, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.

Cumulative upkeep—Pay 2 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When Glacial Chasm enters, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.

Masters Edition II

Cumulative upkeep—
Pay 2 life.
When Glacial Chasm comes into play, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.

Ice Age

Cumulative Upkeep: 2 life
When Glacial Chasm comes into play, sacrifice a land. You cannot attack. All damage dealt to you is reduced to 0.