Fiery Confluence: I almost put this card into its own section, since it isnt necessarily a sideboard-only card, but it certainly fits the role of utility card exceptionally well
$1.99 Ravenous Slime Commander 2018 $0.35 Accursed Marauder Modern Horizons 3 $0.35 Shock Brigade Tarkir: Dragonstorm $0.49 Aeve, Progenitor Ooze Modern Horizons 2 $0.35 Temperamental Oozewagg Modern Horizons 3 $0.35 Corrosive Ooze Dominaria $0.35 Wither and Bloom Modern Horizons 3 $0.49 Inexorable Blob Shadows Over Innistrad $0.35 Experiment One Gatecrash $0.69 Splitting Slime Conspiracy - Take the Crown $0.49 Oran-Rief Ooze Zendikar Rising $0.35 Colossal Dreadmask Modern Horizons 3 0 results found
These cards usually featured cleaner placeholder art and were printed on sturdier white cardstock, which gave them a noticeably more polished look compared to earlier tests
The five Phyrexian Praetors can all also transform into Sagas, provided you can meet their challenging conditions and costs
You could take the banned Izzet Cutter list from Standard and transfer it into Pioneer and do well, just need to swap out a few basic cards
Its not like it's a particularly steep gate to meet in a format like Modern or Legacy, so it's not particularly prohibitive in that aspect
