The Amber/Emerald deck, also known as Dogged and Dynamic, is a nice sampler platter of the expansion's characters and Locations, with a strong go-wide strategy meant to overwhelm your opponent with numbers
You'll typically need to load up with counters at the end of someone's turn when you know what you are going to pop, and then untap and use it
Chandra, Dressed to Kill is similarly safe and unexciting for Cube
His Jeskai (red, blue, white) colour identity gives a lot of flexibility between power and control, but his key abilities lies in the ability to Bolster his comrades, and also being virtually unkillable unless you have an Exile spell
Dredge is on hand to bring back any crucial lands, and it opens up plenty of interactions that keep The Necrobloom's tokens-and-landfall schtick feeling interesting
Faramir, Prince of Ithilien With Faramir, Prince of Ithilien, your opponents are damned if they attack you and damned if they dont