Assuming the opponent is corrupted The Seedcore plus any of the big pump spells - Might of Old Krosa, Scale Up, Vines of Vastwood, Groundswell, Become Immense- is enough poison to close out the game
High Tidea blue card that lets its caster double up on resources for every Island resource they tap, and has been been banned since Paupers online and tabletop banlists were consolidated and unified in 2019, and Prophetic Wisdoma colorless artifact banned in 2022 that players could pay a cost and tap to add any color of mana to their resource poolwill be the first cards to go under the trial period
Imagine losing a key creature or artifact to targeted removal and cloning it on the way out
They were released during a period of multiplayer-focused product development that included the popular Planechase and Archenemy cards
But this goes even further when we use Spreading Plague, one of my pet cards, as a way to insure that our opponents will struggle to keep creatures on the board while we continue to act with impunity