Phasings the best form of protection in Commander, and its nifty tech for equipment and aura decks looking to save permanents attached to their creatures
Bronze Guardian also comes with the upside of being a brutal attacker since its power matches the total number of artifacts you have out, and if that wasnt enough, it has double strike too
Even the best Pokmon cards for rich folks to invest in typically land between the $100,000 and $500,000 range
A less obnoxious move is to use a card like Nissa, Who Shakes the World to animate a bunch of lands to mount a go-wide attack or using the Liquimetal to make a creature into an artifact at instant speed to take advantage of Tempered Steel
They use an "open air" card frame and special rainbow foil treatment, with a holofoil treatment on the icons and a gloss treatment on the artwork
Chances are if youve been playing Magic for more than a month youll have sourced these, but even if you havent, youll be pleased to know that theyve been appearing regularly in newer preconstructed Commander decks