This clever loop turns Chain of Acid's cyclical targeting against itself by pointing it at an indestructible permanent you control, ensuring the spell never successfully destroys its target while still allowing you to feed its echoing copies back to yourself. Because the spell keeps chaining back to your own safe target, you can repeat the process indefinitely to trigger Silverquill Apprentice over and over again. This endless cascade of magecraft triggers pumps your team to astronomical heights, giving you infinitely powerful creatures to crush the opposition before the turn ends.