Vean, Tyrant of the vale

Whenever a creature you control deals
combat damage to a creature and survives,
sacrifice that creature. Then gain life and put a
number of +1/+1 counters on Vean equal to the sacrificed creatures power.
Vean has trample as long as her power is 12 or
greater
Vean has indestructible as long as your life total is
50 or more.