Avatar of Woe (Invocation) [Amonkhet Invocations] Magic Player Rewards 2009 Broodstar's power and toughness are

Broodstar's power and toughness are each equal to the number of artifacts you control

then attach this to it

there was so many arrows flying about you couldn't hardly see the sun

Even after death

Avatar of Woe (Invocation) [Amonkhet Invocations] Magic Player Rewards 2009 Broodstar's power and toughness areSet: Amonkhet Invocations Type: Creature Avatar Rarity: Mythic Cost: {6}{B}{B} If there are ten or more creature cards total in all graveyards, this spell costs {6} less to cast. Fear (This creature can't be blocked except by artifact creatures and or black creatures.) {T}: Destroy target creature. It can't be regenerated.