So if you have Swamp out and Reflecting Pool, your Pool only makes black mana
There are tons of synergies with it
These colors have the most creature cards out of all the 2-color guilds, with a heavy emphasis on token generation, large creatures, enchantments, and lifegain
Blaze Kick does 30 and flips for either 20 more damage or a Burn, while Volcanic Ash discards two Fire Energy to drop 100 on any one of your opponents Pokmon
I did this tally by searching on Scryfall with a year:20xy query (which provides all cards printed that year) do note that for 2023, we only have partial results: So, Fact #1 : Card output started to ramp up in 2019, saw a huge spike in 2022, and by August 2023 we've already seen more cards than any whole year prior to 2019
Oh, and Sephiroth, One-Winged Angel has a decent chance at winning the game