In the games Ive played against it, I enjoyed deciding when to use my interaction against it
It doesn't have to be the same person whose card you exiled although you can keep things from getting angry
Once Lavinia enters the battlefield, she detains all nonland permanents your opponents control with a mana value of 4 or less, blocking your opponents from using their mana rocks, mana dorks, planeswalkers, and early creatures
Its a really powerful and really popular Temur commander, and you can tweak it based on your meta and personal play style
I don't love end-of-turn effects tied to instants and sorceries in Commander unless they have a big impact on the game
There are so many ways you can play, both in person and online, that it can be overwhelming to figure out the best way to jump in