Mulligans
General Mulligans
Always keep Sylvanas, except against Spell DH. In tempo matchups, keep Blightfang. Against control and Spell DH, keep Magatha or Famished Fool and keep Pozzik. In general, try to mulligan for 1-2 or a 1-2-3 curve, but be mindful of the matchup.
This Unholy Death Knight list is the most recent Vicious Syndicate list with -1 Murlocula +1 Famished Fool. The Famished Fool makes the control matchups and the Spell DH matchup easier.