I myself always like both Reach and Cultivate. But 3 CC slots are now jampacked with aggressive options that ask for more proactive answer than a ramp spell. Perhaps if cube ever slow those cards will be stronger and can be bring back.
I put it in Orzhov slot for now, replacing Vindicate. Lingering Soul is too strong, and Lurrus to me is just as strong as vindicate but a lot more unique. I can't rule out having strictly better wrath of god for my cube, so Damn over Vindicate it is.
If I ever want to free up a lot, it'll probably be a white card in my cube. It's Wrath of God mode is going to use so often and it's going to get swipe by white deck a lot more than black deck.
This is the strongest Boros card and should be run in every cube that allow eternal legal card because this card is eternal legal, unless you want to ban some cards based on set.
The instant speed might make this playable over the 5 CMC options. I don't like the risk here though. The floor here isn't high enough for me unlike Comet.
Den of the Bugbear > Sokenzan, Crucible of Defiance
Gideon Jura > The Wandering Emperor
Maybe at 540?
If I ever want to free up a lot, it'll probably be a white card in my cube. It's Wrath of God mode is going to use so often and it's going to get swipe by white deck a lot more than black deck.