Once you get back to Pioneer or Modern, Nature's Rhythm is competing directly with cards like Green Sun's Zenith, Chord of Calling and Finale of Devastation, which means you are going to need a specific reason to play it over the other powerful options
any advice
Book of Life allows you to special summon a Zombie monster from your graveyard, while also banishing a monster from your opponents graveyard
#0137 Porygon Total Market Price $179.09 39 cards priced 2026-07-22 Avg Card Price $4.59 High Card $86.58 Low Card $0.11 Porygon card prices have gained 33.5% year-to-date and is up 3.5% over the past 30 days, with 39 cards ranging from $0.11 to $86.58
Morph is basically a wild card: you can Shift any character onto Morph, no matching names required
At the same time, access to black gives players the option to drain life from their opponents and give it back to themselves, ensuring you stay up on your dwindling opponents