I think planeswalkers coming out of this product are exciting because they can play a dual role of digging up old characters from the past that we never got to see as planeswalkers on cards, while also setting others up for developments in the future
But nowadays with cards like Voltaic Key ($2), Time Vault is incredibly busted
Lavinia is the closest thing to a detain boardwipe pacifying all of your opponents nonland permanents with mana value 4 or less, all while being a 4/4 with protection of red for just 5 mana
The sideboard could still use some work, but from what I have seen so far, this is the way I want to build it
When Contagion Engine ETBs (enters the battlefield), its controller puts a -1/-1 counter on each Creature a target opponent controls
I'll play Time Vault as intended, sorting a turn here and then taking another later