Welcome to Deathspeaker 101!
This deck is adapted from the old Deathspeaker meta of the alpha days. The idea is to chip away at your oppnent's life total whilst controlling the battlefield and outlasting them with card advantage.
Of course, the old combo still reigns supreme (draw cards and discard your genesis cards for "free" damage).
Deathspeaker ain't what he used to be, but he lives still!