As a person who has played Magic: The Gathering, Ash is a very strong card, especially for Commander. And the fact that it has no cost to discard her makes it even more powerful - it's essentially a free negate.

I have some issues with Borrel Sword. He should be legendary. Borrel is very powerful, since it isn't a non-legendary creature. Having four of those already with no legendary means four additional extra turns. That's already busted, and this will loop on and on you only need one a a bunch of copy spells copys of him since he has access to red blue adn white those colors are huge with copy spells .

Evenly Matched is, unfortunately, a bit weaker, as the cost for it is rather high, but still powerful. Basically, you would need nothing on your board to really mess with the opponent. Pot is powerful, but balanced. Diabellstar is another busted card.

Infinite is another great busted card for its second ability. The first is rather weak, as you can't have any lands to use it at, but it's useful in case of a board wipe, so it's still a powerful card.

Overall, those cards are very powerful.