clue mtg cards Token by Frank Wiles Magic: The Gathering - Ravnica:

Winner: Sensei's Divining TopSensei's Divining Top (Creatures: 4, Artifacts: 3, Enchantments: 2) 1

As long as you combine this with some good landfall triggers, or just a land-heavy deck, you can overwhelm anyone by just playing a few more land cards

Its also banned in multiple formats due to how easy it is to win after casting it

If you look at a typical Infect deck list all of its creatures are Phyrexians thanks to an errata a while ago, so The Seedcore works as a dual land (this is could also help open up the possibility of more three-color infect builds rather than the two-color builds which are most popular today), and almost all the most popular Infect creatures are 1/1s, which makes The Seedcores corrupted pump ability especially impactful