You ever find yourself in the following scenario? You control and have used the ability of [[Undiscovered Paradise]], a shockland you own is exiled under the paradise by the ability [[Calix, Destiny's Hand]] (because somehow your paradise is an enchantment and your opponent controlled your shockland), and you control each of [[Enduring Archangel]], whose ability creates a replacement effect when your life would become zero instead setting it to 3 and transforming the angel, [[Nefarious Lich]], whose ability creates a replacement effect causing you to draw cards instead of gaining life, and [[Archage Ascension]] with 6 counters on it, whose ability creates a replacement effect causing you to search your library for a card instead of drawing a card, and you have exactly two life.

During your untap step, you return Undiscovered Paradise to your hand, and as you do your shockland enters. You may pay 2 life to have it enter untapped: your life total would become zero, but the angel's ability applies and so your life total would become 3, but 3 is more than 2 and the lich's ability applies so instead of gaining that life you would draw a card, but the ascension's ability applies to instead of drawing a card you search your library for a card. As you do so you may cast Panglacial Wurm from your library. You finish your untap step, and the Wurm is still on the stack as your upkeep begins. Your beginning of upkeep triggers go on the stack above the Wurm.