If Tymna and Bruse Tarl are your commanders, your deck may contain cards with red, white, and/or black in their color identity, but not cards with green or blue
Razoul Palace Guard Razoul is a decent card but for my money Id rather go with Prince Eric
Boosters are fun for discovery, but Commander decks usually need specific cards
This includes recurring enchantments such as Rancor, correct
1 Uncommon Nazgl or an uncommon with the showcase Ring treatment Here, you can get either 1 of 10 uncommons with the showcase Ring treatment (91%) or 1 of 9 possible artworks from the uncommon Nazgl cards (9%)
Doran, the Siege Tower The following things are all true at the same time of Doran, which if you look at nearly every other conceivable Magic card, seems impossible: It shows something about the world it belongs to, it has an intriguingly "different" mana cost and p/t, it demonstrates a never-then-before-seen ability with very few words, and finally the flavor text effortlessly ties the smile-inducing ability, the nature of the character, and its application to our real lives