The first Room costs five front end to make all of your nonland enchantments for things like your wins cons, and then the later three cost will lets your casting of those grow your team permanently in size with +1/+1 counters of it's mana value, red zone win con
The synergy in this deck is off the charts
In Secrets of Strixhaven you can represent your two-color college of choice, and prepare your schedule for lots of elective strategies
1 Marrow-Gnawer Fear The Rats Marrow-Gnawer is the primary commander for Rat decks if you're building one, and even if you aren't using it as a commander, it's the best Rat card there is
Trigger Discard (sample: Bottomless Pit) I play a permanent that causes one of the above discard effects to trigger whenever situation X happens
He credits that jump to two things: a boom in collectible card games, especially Pokmon, and his company's push into livestreaming