Cast Cloudshift by paying , targeting Returned Pastcaller
Storm-Kiln Artist triggers, creating a Treasure artifact token.
Resolve Cloudshift, blinking Returned Pastcaller
When Returned Pastcaller enters the battlefield, it triggers, returning Cloudshift to your hand from your graveyard.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.
This elegant loop relies on Cloudshift to continuously blink Returned Pastcaller, which feeds its own recursion by constantly fishing the instant right back out of your graveyard. Meanwhile, Storm-Kiln Artist acts as the engine's core economic engine, transforming every single casting of Cloudshift into a fresh Treasure token to fund the spell's white mana cost. Together, this trio generates infinite magecraft triggers and a limitless storm count while flooding the board with boundless artifact and creature entry events.