In current Standard, you should be aware that most control decks play with one copy of Ugin, the Spirit Dragon and one to three copies of either End Hostilities or Crux of Fate
In this case, with 59 rares and 18 mythics, the number is 136
Turns out, when you can consistently make players discard cards and lose life, you have a pattern thats very hard to come back from
7 Inspiring Refrain If you want an explosive turn later in the game, you cant go wrong with Inspiring Refrain
The card is a Commander super-staple and sees a ton of play in Premodern, Legacy, and Vintage to boot
Sometimes something pushes toward a certain rarity because a lot of similar cards in the past have been that rarity