Bitterblossom can be the base of a faerie typal deck, add fliers to the board, pressure control decks, and synergize with ninjutsu creatures, all in one package
Cut-Ribbons is not a card Ive played yet, but I dig it, my friends dig it, and if it plays half as well as Im about to speculate, then it is going to be a solid Commander goodie
This is a strong place to put your equipment and auras
Certain cards in the deck can help to discount spells, but this is only a band-aid to the bigger problem
Darksteel was the first "small" expansion to have 165 cards, where as previous small expansions had 143, (with the exception of Legions which had 145 as a balance among the five colors.) The following mechanics first appeared in Darksteel: Indestructible - Mechanic that made permanents indestructible