King of Lost Souls

Banished Soul can be your commander
Flying, Lifelink,Haste,Double strike, indestructible, annihilator 6
{1}{b}: pay 1 life, destroy target permanent
{2}{b}{b}{t}: you gain X life, where X is equal to the amount of life lost this turn.
"The king an be summoned by a soul in need, for anything"
"So what was the king called for this time?"
"The world needed destroying, and he is the only one strong enough."