Turning your dead vampires into bats that bring them back opens the door to interesting sacrifice synergies, potentially making this more of a specific aristocrats commander than a typal one
The best zombie commander for combos is Mikaeus, the Unhallowed
If it weren't as good in EDH as it was in other formats, (and it is so no worries) then it's presence as the most-played card in the game could be questioned
The target creature you control copies the printed values of the other creature plus any copy effects that have been applied to it
Its also a really cool card that rewards you for discarding, and it can be a wheels commander, a madness/mayhem commander, and more
Put the exiled cards on the bottom in a random order.) Once you announce that you're casting a spell, players can't take actions until you've finished casting it