old mtg card art artifact from 1999 sees 900% price rise old mtg card art Actual

Many popular commanders cost 4 mana

During its WeeklyMTG stream on October 4, Magic: The Gathering creator Wizards of the Coast showed off the 'participation promo' cards for the next seven MTG sets, including one set from the far future, codenamed 'Polo', that has not yet been revealed

The answer, I believe, is this

Lightning Greaves These boots werent made for walking, but they will definitely protect your commander and kick butt later in the game

The Pack Rat has only ever had one other Secret Lair printing before, with that totaling $13, which might bode well for this cards foil printing (as the theme/art will more than likely impact the price)

This goes best with creatures like Cruel Somnophage, Wight of Precinct Six, and Mortivore