Mulligans
General Mulligans
If you get Crystology mulligan Secretkeeper away and get Call to Adventure
With so many Secretkeeper drawing cards, most notably 2 copies of Crystology with no other 1-Attack minions, it is almost guaranteed that you can build a strong Secretkeeper early game. Save up 1 for playing with 5 Secrets (such as those you drew with Subject 5) and with Commander Rhyssa, for incredible synergy such as double Avenge through a Noble Sacrifice.