The connected commons and uncommons have gone away, and part of making the booster playable included balancing colors, so the new Play Boosters will do that
The same thing I said for the previous card applies for Disciples of the Inferno: This is very much a burn card
But the table does suggest that you should be leaning more towards the best four performing archetypes (BR Party, BW Clerics, RW Warriors, and UB Rogues) if possible
Casting spells during your opponents turn, however, wont affect whether its day or night on your turn
I played a ton of it in Standard on MTG Arena, and when Alchemy rolled out tweaks to the dungeon cards making them stronger, I wracked up a ton of wins
As a player with a limited budget, you're almost certainly better of picking up something like a Commander 2020 deck for $40 than spending $40 on a handful of cards from a Secret Lair drop