Scavenging Ooze is one of the most important reprints in Core Set 2021. This card will fit in all green decks in Standard, and it will do really well against cards like Uro, Cauldron Familiar, Woe Strider, and Zenith Flare.
Scavenging Ooze also fits in mutate-based decks, since it's not a human. The Green-White Counters deck will also find a couple of slots for this creature, and it will perform really well in all of them.
Taking into account how many top-tier graveyard-based decks are played in Standard right now, it's clear that Scavenging Ooze will dominate the format this season.