Gluttonous Keepsake

As an additional cost to cast this spell, sacrifice a legendary creature you control.
{t}, Sacrifice a creature: Put a counter on
Gluttonous Keepsake.
If your health would become less than one,
sacrifice Gluttonous Keepsake. Your life total
becomes equal to the amount of counters on
Gluttonous Keepsake and you draw a card for
each counter on Gluttonous Keepsake.