In terms of balance, Spitting Dilophosaurus is probably too weak in Cubes featuring Orcish Bowmasters and has potential to be on the strong side for Cubes of lower power levels, but the card comes at a solid rate and I would expect it to find a comfortable home in a lot of Cubes
Instead, Purphoros has proved itself in the Commander format as a favorite mono-red commander, and it's easy to see why
Gray Merchant of Asphodel forces your opponents to lose X life, equal to your devotion to black, and then you gain the total amount of life lost
While the destruction might be disproportionate, putting everyone on an even level and giving them a chance with three or five lands is significantly better than blowing everything up
There are so many different paths you can take next
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Sothera, the Supervoid: If Sothera leaves the battlefield at the same time as one or more creatures you control die, its first ability will trigger for each of those creatures