Bowen, The Blackest Knight

Double Strike Haste Intimidate Deathtouch Reach Trample
Bowen, The Blackest Knight can't be blocked.
{x},{t},Exhile X cards from all graveyards: Bowen, The Blackest Knight gets +X/+X until end of turn.
Whenever Bowen, The Blackest Knight dies, you gain 4 life.