Edh

[Taysby]

I have two edh questions
1 I {mystifying maze} an opponents commander.  Does it return to the command zone, or does it do the cards effect and stay in exile.

2 we are already discussing this in a different thread, but that is going no where.  Can I have 60 odd {relentless rats} in a commander deck.  Some people say, the rules say otherwise.  Some people say the card overrides that rule.  Some people say the people who design magic say its ok.  What wins?

[Agrus Kos, Enforcer of Truth]

The EDH Rules Committee has stated it's okay. http://forum.dragonhighlander.net/EDH_Forum/viewtopic.php?f=2&t=127&start=17

Also in almost every case, rules on the card trump rules in the game unless there is a specific ruling, which I have not found.

[Agrus Kos, Enforcer of Truth]

Ruling 12/1/2004-{Relentless Rats}'s last ability overrides the normal limit of four of an individual card in a Constructed deck.

Whether it also refers to commander, I don't know but I would assume so.

[Gorzo]

Relentless rats are legal to have multiple copies in EDH. So are {Shadowborn Apostle}s now that they exist. Card rulings printed on a card about number-in-deck legality supersedes format.

As for exiling with mystifying maze, it would be that commander's controller who chooses what happens. Since you may -choose- to send him to the C-Zone upon exile, he gets that choice. If he returns him to the C-Zone, he will stay there and not return when the maze's effect ends (as he is no longer in exile to return from). He will suffer the normal +2 casting cost to recast penalty.  If he chooses to leave the commander in exile from the maze, it will return from the end of the Maze's effect as normal.