This ingenious loop turns the graveyard into a revolving door between two master alchemists. By using Hell's Caretaker during your upkeep to sacrifice itself and resurrect **Activated Sleeper**, you set up an immediate recursion engine: the Sleeper enters the battlefield as a fresh copy of **Hell's Caretaker**, ready to tap and sacrifice *itself* to bring the original Caretaker right back. Meanwhile, **Tuktuk Rubblefort** sits quietly in play providing the haste needed for any other creatures you might want to cycle through this loop on the spot. Because the newly returned Caretaker retains its haste and lacks summoning sickness thanks to the Rubblefort, you can instantly repeat the process to generate infinite enters-the-battlefield, leaves-the-battlefield, and death triggers.