Cryptolith Fragment enters the battlefield tapped.
: Add one mana of any color. Each player loses 1 life.
At the beginning of your upkeep, if each player has 10 or less life, transform Cryptolith Fragment.
In a Two-Headed Giant game, Cryptolith Fragmentâ€™s mana ability causes each player to lose 1 life, so each team loses 2 life.
In a Two-Headed Giant game, Cryptolith Fragmentâ€™s last ability checks whether each teamâ€™s life total is 10 or less.
If any player has 11 or more life as your upkeep begins, Cryptolith Fragmentâ€™s last ability doesnâ€™t trigger. If any player has 11 or more life as the ability resolves, the ability has no effect.
For more information on double-faced cards, see the Shadows over Innistrad mechanics article (http://magic.wizards.com/en/articles/archive/feature/shadows-over-innistrad-mechanics).
Cryptolith Fragmentâ€™s second ability is a mana ability. Players canâ€™t respond to it or to the loss of life it causes.