Glacial Chasm [From the Vault: Realms] Human Shapeshifter Assassin and ungoverned by rationale

and ungoverned by rationale

Set: Collectors' Edition Type: Sorcery Rarity: Uncommon Cost: {2}{G} Destroy target land

or the effects of attack reaction cards this turn

Set: Double Masters Type: Artifact Creature — Construct Rarity: Rare Cost: {5} {T}

Set: Black & White: Black Star Promos Type: Psychic Rarity: Black Star Promo Retreat cost: 0

Glacial Chasm [From the Vault: Realms] Human Shapeshifter Assassin and ungoverned by rationaleSet: From the Vault: Realms Type: Land Rarity: Mythic Cumulative upkeepPay 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 the battlefield, sacrifice a land. Creatures you control can't attack. Prevent all damage that would be dealt to you.