In short, you play this card if you can
Additionally, Withering Torment is an instant, which makes it a better form of interaction than a sorcery like Feed the Swarm
The set will be followed this spring by Ikoria: Lair of Behemoths, an expansion set in a brand new world that introduces gameplay rules that allow players to create their own monsters during matches - something head Magic: The Gathering designer Mark Rosewater has described as one of the craziest mechanics we've made in quite a while
When Nethroi mutates, you get to bring back any number of creature cards with a total power of ten or less to the battlefield
The third ability is nice tech against treasure, food, clue and other decks that rely a lot on noncreature artifact tokens
Rayquaza VMAX , and The Zeraora / Deoxys High Class decks