mtg split second cards with Angel's Grace | Time Spiral Then the spells controller may choose new targets for it. Sudden Shock Take Possession (Modern Masters)

There are a few exceptions, and there is a handful of cards that are banned in the format

Niv is always going to generate some value for you

You can sacrifice, for free, any dork without spending any resources

9 Maleficent's Staff Card 210/204 EN.6, Amethyst Ink As an Item card, Maleficent's Staff can stay on the table until banished, and provides its player with one lore for every card of their opponents' that gets returned to their hand

There will always be one player at the table who most threatens your life total, and most lifegain decks also want to keep life high for the likes of Aetherflux Reservoir or game-winning triggers

The upside is that Harmonize is a reliable card that will always do the job its supposed to do