Thanks to the three-year rotation, Wizards is planning to develop archetypes over time, similarly to how blocks did things
Personally, I have now opened around 150 booster packs of Ultra Prism and have lots of openings to post to YouTube very soon
T: Add CC to your mana pool
The newest blue Magic card with Totem Armor is Octopus Umbra
It does bother me a little that it itself is not a permanent, because most of your Black/Green decks are going to want as many permanents as possible to get the best mileage out of all the Descent stuff, and obviously it isnt very good in your opening hand A 5-mana 6/4 with Vigilance and Menace is already a pretty imposing creature, and this one can come back in the later stages of the game
The best cards to slot into these decks are cards that take advantage of the amount of mana you can generate, or cards that can win the game on their own