Turn 10 : WS Rank 3 x2 + SS x2 + Eviscerate x2 = 12+6+8=26 damage, 10 mana.

Or....Turn 4: Octobot + Backstab on it, -1 cost for all your cards, including Bloodmage

Turn 5: Bloodmage + WS Rank 2 x2 + SS x2 + Eviscerate x2 = 10+8+ 10 = 28 damage Turn 5.