Living Tub

You may play any amount of lands on your turn.
Other lands you control have:"{t}: add {x} to your mana pool
where X is your life total".
{t},{3}: You gain 1 life
{t}: Add {x} to your mana pool where X is your life total.
Living tub's toughness is equal to your life total.
Living tub's power is equal to the number of lands you
control.