As far as a card goes, Burnished Hart was a ramp staple for a long time in any non-Green deck that just wanted to get lands out onto the battlefield
You can obtain the Melmetal ex (4-Diamonds rarity) card by opening Mega Rising: Mega Gyarados from Mega Rising set
Being able to phase something out as a protective measure is a useful, powerful effect worth having in your back pocket, especially in Commander
There is not enough Reparations in my opinion, in near-mint Reparations, for people to make a god-tier amount of money off of this, Wubby said
Scroll all the way down to the "Booster pack" option near the bottom
While in theory it has some great effects like making your Ra unaffected by your opponent's cards and letting you wipe all other monsters on the field during the battle phase...the problem is it has too many drawbacks