They won't copy other effects that have changed the targeted creature's power, toughness, types, color, or so on
However, the best one of all time might just be this uncommon Gobbo lord that debuted all the way back in 2003s Scourge set (which was the final Magic set to feature the iconic vintage card frame)
6 Jidoor, Aristocratic Capital - $142 Prerelease Foil It takes a lot for a land to crack the most expensive cards in any set, but given how popular the Final Fantasy set has been, it's even more surprising to see Jidoor, Aristocratic Capital trending for almost $150
Mickey can quest for a tasty three lore, and the 'Glad You're Here!' ability makes your next character three ink cheaper any time the card goes questing
Bathroom renovations offer the greatest return on your investment