mtg arena card draw Swords (Red) | Heavy Hitters 15 Best Black Card Draw

The STL files also include blank doors, and doors with dice slots similar to the commander tray

In which case, this seems a slightly odd selection of prize cards

So: No, you don't have to cast both - the reminder text says "you may cast one or both"

Sokrates has Hexproof as long as he remains untapped, and has the Sokratic Dialogue ability - which lets him give one target creature "If this creature would deal combat damage to a player, prevent that damage

The best commanders for cEDH generally have partner - meaning you can play two commanders if they both have partner

Its expensive to get down, and the trick is harder to use than the cheaper Athreos