BloodDrinker

BloodDrinker does not untap during your untap
step
Whenever a creature dies as long as
BloodDrinker is untapped you may exile it if you
do you may either lose X and put that many
+1/+1 counters on BloodDrinker where X is the
exiled creatures power or untap Bloodrinker and
Gain X life where X is the exiled creatures
toughness