Azrael, The Mad Dog

Trample, deathtouch
When Azrael the mad dog enters the battlefield
reveal the top X cards of your opponent's library
where X is the amount of mana spent to cast it
he gets +1/+1 counters were X is the highest
power among creatures revealed.
If Azrael has more than 10 power he gets haste
If it has more than 20 he gets indestructible.