This clever sequence lets you turn a single casting into an endless stream of creature tokens by exploiting how the stack and replacement effects interact. When you cast Huatli's Raptor, you immediately respond by using Myojin of Cryptic Dreams's activated ability to create three permanent spell copies of the Raptor. Crucially, because Myojin of Cryptic Dreams begins its work by removing an indestructible counter, Myojin of Cryptic Dreams relies on Huatli's Raptor's enter-the-battlefield trigger—which proliferates—to continually replenish that very same counter. By looping this process, you get an unending chain of creature tokens, triggers, and proliferation.