Living Tome

When this creature enters the battlefield, choose
target opponent. Target opponent takes control
of Living Tome.
Beginning of your upkeep you draw 10 cards.
Your lands tap for triple the mana.
Other creatures you control have indestructible.
At the end of your end step you lose life equal to
the amount of cards in your hand, untap
lands, unused mana and creatures you
control.
You lose 5 life at each opponents upkeep