It can work again and again to make a 4/4 token horde, and you can make multiple tokens as long as you have the mana and the targets
The big flaw to this plan, however, is that all of your work with Roil Elemental is undone with one removal spell
Add to that the 5+ lifegain you benefit from because of your Goyf/Souls/Tas, and Burn is now at least four cards behind, double time walked, and totally out of the game
Meanwhile, the 1 can combo with Felidar Guardian, but you need an extra piece for this combo to actually do anything (something like Altar of the Brood to take advantage of infinite enters-the-battlefield triggers)
This is a Jeskai (Red, White and Blue) deck that uses its commander to quickly end games, or amass a large board presence also to do the same
A significant number of white weenie one drop two drop openers will also completely die to an Arc Trail