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This led me down a rabbit hole of discovering all sorts of cards that were banned

Robin Hood, Champion of Sherwood Remember Aladdin, Heroic Outlaw from Lorcanas original set The First Chapter

Lathril, Blade of the Elves and Kinnan, Bonder Prodigy are strong examples of commanders that benefit from a higher creature count in ways that make up for the inherent fragility of creature-based ramp

As one of the best MTG sleeves, it supports double-sleeved cards, fitting ideally inside the binders

You know that already, but there are some interesting build arounds that are worth diving into

You could combine it with cards like Bristlebane Battler to make more saprolings (or even better, to leech from an opponent that has that card and kill it later by doubling its counters)