Old fans and curious newcomers can expect it to play out exactly as before, except for the inherent suggestion of using the convenient 100-card singleton deck, instead
Then the Vampire was printed next, same cost, this time it adds flying and +1 toughness, but it just works once per turn so it's both better then Mentor (flying, bigger size, no mana needed) and worse (just once per turn)
Elspeth, Storm Slayers Halo Foil variant is going for a whopping $400 right now, but thats actually slightly below market value
Unless it is offering you a bunch of utility I would generally rather a Farseek / Rampant Growth style card in my deck
The Green uncommon two-drop will ETB, equip for free, and then hit a dork and give protection in ward 2 and reach too
There are good ways to deal with it such as countering the adventure part or having graveyard exile, but it snowballs quickly outside of that