Wraith Lord

Flying, Cannot be countered, enters with a +1/+1 counter
Wraiths Curse (this creatures takes double damage)
Wraiths Fearing Aura (opponents cannot cast spells while this creature is attacking or blocking)
{5}{t}put 20 0/1 darkling's onto the battlefield
Wraith Lord power and toughness is equal to the number of Darkling's you control