Atropos, Sister of Fate

Indestructible.
Atropos can't attack or block unless you own
3 creatures in exile with fate counters on them.
{b}, Sacrifice a creature you control that
has a fate counter on it: Draw 1 card.
Atropos power and tougness is equal to
1 plus the number of creatures you own in exile
with fate counters on them.