Firstly, you can currently only trade cards of a one Diamond, two Diamond, three Diamond, four Diamond, one Star, two Star, one Shiny and two Shiny rarity
Every noncreature spell you cast gets you three instances of damage, and therefore three instances of lifegain
It is also good against decks that need specific cards in the graveyard
Those colors also feature the new triple keyword action
It can also be run in any other dedicated lifegain-themed decks
4 Perennation = Cant Lose Secnario Standard/Commander Maybe less of a combo and more of a strategy, but no less effective when it comes to winning a game, the combination of Prennation and Herald of Eternal Dawn can stall out a game in your favor and put your opponents in an inevitable loss situation