While Izzet Dragons spends its first few turns setting up with Expressive Iterations, Mono White has the capability of completing going under some of the midrange decks of the format
You can cash in a 2/2 zombie token to get two 2/2 Zombies, and so on
If you sink mana into it to level them up, it becomes a pretty nice life gain payoff
This nickname came about because the three highest profile comes into play creatures all destroyed something
There are also a handful of Commander decks that have access to a lot of mana, a lot of cards, and a fair amount of mill which benefit from playing Conflagrate
Creature, artifact, enchantment, land, Planeswalker as long as its a token, you can sacrifice it here