The ceiling is not quite as for Arc Trail high but is none the less surprisingly close and more importantly it is much much easier and more common to reach or get near that ceiling and early in the game too
When the card came out, everyone asked me if I'd designed it, and I said yes, but no one seemed to listen when I explained all the above, so people just mocked me on social media (I'm used to it, but still)
Enchanted cards are special full art foils and they also appear in the foil slot
Being the focal point of a combo deck makes it a prime target for being banned immediately, holding the record for being the fastest ban after its initial release in the history of Magic
Against the mirror, 4C Loam, or other decks that partially rely on their graveyard for incremental value, Bog can do real work without costing you a spell slot
For better or worse, Partner is a part of the format now, and barring a Companion-esque power-level errata coming sometime in the future (extremely unlikely, given that Partner has no real effect on Constructed formats, which is what drove the Companion errata), it will remain difficult to balance and a point of contention
