Time Sieve + Tamiyo's Journal + Academy Manufactor + Sculpting Steel

Time Sieve

Tamiyo's Journal

Academy Manufactor

Sculpting Steel

How it works

1. At the beginning of your upkeep, Tamiyo's Journal triggers, creating three Food, three Clue, and three Treasure tokens.
2. Activate Time Sieve by tapping it and sacrificing five artifacts, causing you to take an extra turn after this one.
3. Repeat each turn.

This engine achieves infinite turns by using the incredible replacement effect of Academy Manufactor to supercharge Tamiyo's Journal; instead of just investigating at the beginning of your upkeep, you are generously rewarded with a flood of Clues, Foods, and Treasures. You then feed five of these newly minted artifacts to Time Sieve to buy yourself an extra turn, while a clever copy of Sculpting Steel stands ready to assist if you need redundancy among your key pieces. Because Tamiyo's Journal refreshes your token supply every single upkeep, you have a perpetual fuel source to keep chaining extra turns indefinitely and lock your opponents out of the game.