Ahab, Fan to the Flame

Sin (enters the battlefield with a Sin counter;
Sin removes Pure, and Pure removes Sin.)
Ahab enters the battlefield under target player's control.
Ahab cannot block or be blocked by
creatures it's owner controls.
Spells and permanents controlled by Ahab's
owner but owned by Ahab's controller cost
{2} less to cast and have Ward {2} against
sources Ahab's controller controls.
If Ahab loses Sin, exile it. 1 Kings 21:25