Thanks to Whispers in the Well and powerful cards like Demona and Hades, thats unlikely to change anytime soon, and Blurple continues to be a meta relavent choice in the Whispers in the Well format
These are used either with specific effects that can interact with artifacts, or used to ramp into high-mana spells
The Staff will copy any Eldrazi spell that we copy with Ulalek, which can only be good for us, right
For that reason, Id include a fair amount of artifact mana cards that cost three mana, like Darksteel Ingot
Seven mana seems like a high cost for an ability until you remember some of the amazing dragon synergies like Goldspan Dragon and Savage Ventmaw
This means you can play the card as an enchantment at first, but immediately turn it into a mighty creature simply by blinking it