The set was accompanied by a dedicated Grand Prix in Las Vegas which drew a record 4,499 players and began a period of five years in which Wizards released six total Masters sets, all of which were made up entirely of reprints: Modern Masters, Modern Masters (2015 Edition), Eternal Masters (2016), Modern Masters (2017 Edition), Iconic Masters (2017), Masters 25 (2018), and Ultimate Masters (2018)
Core Cards and Why to Play Them Both Ruby and Steel have incredibly powerful cards, turning them into the best support colors in the game currently leading to decks like Ruby Amethyst control and Amber Steel songs dominating the metagame
2) Tutors like Green Sun's Zenith and Finale of Devastation can be used to find early mana creatures and large threats, providing more consistency
Together, these inks amplify each others strengths
Controlling a permanent good enough to impact the board without being egregious enough to be whacked is part of winning