I dont actually find the card to be all that good in Vintage Cube, but once you lower the power level a bit and intend to play games that last a little longer, you really start to see the value of the card selection that Dragons Rage Channeler offers
There are plenty of amazing Un-cards to add to your Cube and these are some of the best
Glacial Chasm Glacial Chasm is our final good damage prevention if you build around it card, and I like it because many of the cards you use to make it ticklike Solemnity, Ramunap Excavator, and Azusa, Lost but Seekingare impactful in their own right
Five-mana board wipes rarely go the distance in Modern, but this combo may be an exception
10 best Dominaria United cards in Magic: The Gatherings newest set Legendaries for everyone
Besides characters with the Ward keyword - meaning that they cannot be targeted by any method besides challenging - Prince Eric, Expert Helmsmans ability can be used against any card you fancy