The casting cost, the flavor text, the mechanics they all riff off of Nivs endless Curiosity (which to be clear synergizes incredibly with the first two versions of Niv, and is a straight up combo with Niv-Mizzet, Parun)
The loop is simple: Sacrifice or kill one of your creatures Broodscale gets a +1/+1 counter you Adapt it to make a Spawn token the Spawn sacrifices itself Long Feng triggers put the counter back on [[Basking Broodscale]]
It wasnt a great success, maybe because it also centered around Vent SentinelVent Sentinel and red walls, but probably because the deck never had a way to consistently complete its ultimate strategy of taking many turns in a row
Competitive standard: English remains the primary language for high-level organized play
This land reminds me of Mana Confluence, a spin-off of City of Brass
A card like Gallifrey Falls No More also strikes me as a beautiful fusion of Magic mechanics and the flavor of the source material