Glacial Chasm
Land
Cumulative upkeep--Pay 2 life. (At the beginning of your upkeep, put an age counter on ~this~, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When ~this~ enters, sacrifice a land.
Creatures you control can't attack.
Prevent all damage that would be dealt to you.
Serendib Djinn
{2}{U}{U}
Creature -- Djinn
5/6
Flying
At the beginning of your upkeep, sacrifice a land. If you sacrifice an Island this way, ~this~ deals 3 damage to you.
When you control no lands, sacrifice ~this~.