I beat doom lord
deck (anger, anger, unbreakable, unbreakable, bloodlust, furious charge, block)
other cards that were in my deck but i didn't use them in the boss fight (overpower, sprint)
First phase (play anger, play unbreakable, play bloodlust fourteen times, repeat until next phase)
Second phase (anger (to draw unbreakable in case you didn't get it or furious charge), unbreakable (to draw furious charge), furious charge, block, end turn, repeat until phase 3)
Third phase (phase one strategy beats this)
win!