The Bacta Tank

When The Bacta Tank enters the battlefield, exile
a creature card from your hand
At the end of each turn, put a Bacta counter on
The Bacta Tank
{1}{t} Sacrifice: Return a creature card exiled with
The Bacta Tank to the battle field with a mana cost
equal to number the number of +1/+1 counters
equal to the number of Bacta counters on The
Bacta Tank, with that number of +1/+1 counters