While there are many directions that we could have focused on with him, the two most important ones were the Malus Codicium , a grimoire of devastating potential, and Cherubael, a daemonhost whose destiny is intermixed with Eisenhorn and who he eventually controls with the aforementioned book
all you need to know for Swinging Ship is you need to open the attraction, roll a 6-sided dice, and get a 2 or a 6 during your first main phase, and then you get an additional combat phase after your first one
What I will say in M14s favor: Core sets are like the summer vacation of limited formats, and after the never-ending clusterfuck that was Dragons Maze (specifically at Gamma Ray yeah, I said it!), it will be a nice brain break before we jump into whatever kind of fresh, sweet expert set hell triple Theros limited is going to be
For just two mana, you can grab any card you want from your deck and add it to your hand with no drawback