If it's 5 or less at that time, even if you gain life later in the turn, you'll still be unable to lose life or lose the game that turn, and your opponents will still be unable to win the game that turn
All Spells deck because it gets around the Leyline of Sanctities the often play in the maindeck, since it doesnt target
I have seen it in a SaffronOlive deck in Modern as well
Ravnica Remastered: Most Expensive Cards #1: Cyclonic Rift (Anime Borderless) As one of the most powerful blue mana staples of all time, any reprint of Cyclonic Rift was bound to send the MTG community into a frenzy
The limited Illustrator batch, which was printed in 1997, set records for trading-card sales more than a decade ago when it became one of the most expensive publicly auctioned non-sports cards in history
Understanding the differences can save you money and frustration