For Timey-Wimey, it's built around the new (at the time) mechanic time travel, which lets you add or remove time counters from permanents or cards that are currently suspended
If I were to build this list, I expect it might struggle at the LGS I play at
Its only one precon, but it does come with six different legendary creatures who could work as your commander depending on how you combine them (five of the cards have a special Partner mechanic called Character Select that lets you start with two of them in the command zone instead of just one)
If a creature has two instances of devour then the player chooses one of those instances to apply
EDHREC ANALYSIS RELATED PRODUCTS:
Adrix and Nev, Twincasters Adrix and Nev, Twinscasters is another popular Merfolk commander, but this one certainly doesn't need you to be in a dedicated Merfolk deck