Overwhelming Parasite

Deathtouch
Lifelink
Bestow {3}{u}{b/g}
Gain control of enchanted creature if it is mana
value 5 or less. Untap it. It cannot attack. At the
beginning of your endstep put a -1-1 counter on
enchanted creature, then you gain 2 life for each
-1/-1 counter on enchanted creature. When
enchanted creature dies draw X cards where X
is the number of -1/-1 counters on enchanted
creature.