Most of them merely require to you have both halves in play, like Brisela, but others may require both halves to attack (like Mishra, Claimed by Gix), or have a certain amount of cards in your graveyard (like Titania, Voice of Gaea)
Said store also didnt really have an active EDH scene yet, mainly the same five or six people playing what in my eyes seemed to be two-to-three-hour games which from a distance looked tiring and confusing
Once they understand that youre on their team and want them to have fun itll be a lot easier to land on (and explain) household rules around appropriate video games
We also all know that mill is the best strategy out there, and playing it in Commander is only for the bravest MTG players
However, some don't care and can trample their opponents
I have cast Timewalks off the remp he provides and won without my opponents getting a turn to react to the Tezz