Ive seen games where Archangel landed on a modest board, and two turns later, everything was massive
I did say that I dislike Cabal Coffers and similar Mono Black Control lands in this deck, but lands that 1) enter untapped and 2) tap for B are always worth considering: Shizo, Death's Storehouse and Takenuma, Abandoned Mire are top on the list, but for colorless lands I think Nykthos, Shrine to Nyx can probably start ramping by turn 4 and Phyrexian Tower is worth testing too
So, for a total of six mana, you can make Zack a respectable 4/6 with the Buster Sword equipped
If you have a lot, subdivide by color within each set
Prominent from the dawn of MTG, dragons have had a whole MTG set dedicated to them in Dragons of Tarkir, and even gave rise to the popular Commander format, otherwise known as EDH or Elder Dragon Highlander
This legendary land is highly played in all formats where its currently legal, and coming to Modern is only going to increase its play