It used to be that placing a card face down on the table would cost you three mana
If you're in a removal-heavy meta and you know this weird card will get blown up before you get to put that third study counter on it, you might want to pass on Pursuit of Knowledge, but I like it enough to be willing to give it a try
It would normally cost you $69.99 (which felt steep even at launch), but now its down to a slightly more palatable $59.99 on Amazon
Just 2-3 triggers, such as from Food tokens, turns Elvish Archivist into a huge beater and makes it far more relevant when both players have impressive board states built up
I do wish there were some better cards for this, but that can ultimately be found in mono-red and mono-black cards
The Green common tosses a counter on your dork, it gains reach and untaps to chump block a flyer outta nowhere and then evasion in trample and then indestructible to save it from anything