Ahzzar, the Black

When Ahzzar deals damage to a player,you may
draw a card and lose 2 life.
Whenever you lose life,
you may choose to lose twice that much life,
if you do,
put 2 +1/+1 counters on Ahzzar
Dragons you control have "{t}: this creature deals
half of it's power
rounded up to any target, you lose 1 life."