Blasphemous Act also becomes much easier to cast with more players around, and 13 damage almost guarantees a full board clear
That said, it doesnt do too much for oozes specifically, but making more oozes certainly helps
Starnheim Unleashed Reminiscent of Entreat the Angels, Starnheim Unleashed makes angels at a worse rate when making multiples, but the worst case mode of making a 4-mana 4/4 flier is still pretty good
It also gets really obnoxious in multiples, so it might be really dumb to play against out of some decks
If you've got a deck with a big commander, or a solid amount of creatures with large butts, you can easily make Toxic DelugeToxic Deluge one-sided by choosing a lower number
Considering certification by recognized organizations (PSA, BGS, CGC) can authenticate the card, assess its grade, and protect its integrity, thus ensuring a better long-term investment.