Recent reports noted an official announcement is likely for the upcoming Pokemon Day celebrations, which are set to take place on Thursday, February 27
I ran Crater Hellion as a way to help improve red control decks and Wildfire decks as a creature that supplemented Wildfire and Burning Xinye by acting in a similar role (at least on the dealing four damage to all creatures) while providing a 6/6 body (albeit with echo.) It was very useful because, while there are a lot of creatures that destroy a single creature, there arent many that destroy several and outside of ones like Elesh Norn, Grand Cenobite, Inferno Titan, and Massacre Wurm, a majority of them just arent that great (Sunblast Angel isnt used in many cubes.) I ended up cutting it due to space constraints, but that by no means implies that I thought it was bad, as I very well may add it back if I want more support for the Wildfire/mass-removal deck
The scarce middle tier, worth clearly more than Unlimited
Green doesn't tend to get flying or first strike, so repeating the abilities wasn't an option
In deck building, this balance is called the "mana curve." Each spell has a mana value, which is the total mana cost of a spell
While weve already covered your strongest and most reliable ramp options, there are two more you might want to consider