For a 60-card deck with 24 lands and 8 removal spells, the chance that an opening 7 satisfies both is 53.7% compared with 85.7% for the lands alone and 65.4% for the removal alone
Although his powerful stats and his great ability that trigger whenever one or more dragons attack and offer us card draw and a free permanent from our hand onto the battlefield, his true power comes from its Eminence ability : A Dragon cost reduction by that is practically always at our disposal
This card will be huge in almost all control lists in standard, but it may also find its way into some midrange lists that use white as well, including Mono White, Azorius, and Esper archetypes
Theres no reason to play a Hermit Druid with one basic land in your deck if your best reanimation targets are Amugaba , Delraich , or Craw Giant
9-cost Kaido can trash one of the opponents 7-cost or less Characters and force them to trash a card from hand
Ultimately, it wont be worth doing so if your deck doesnt have some manner of sacrifice theme and ways to use the extra mana, but Magic has been incredibly long on both of those things for years now, and sacrifice decks show up in more and more Cubes all the time