Again, this is more prevalent in the Drytron lists, but any deck that doesn't need its normal summon can most definitely use this
Any time a legendary creature with mana value 4 or greater enters under your control, you become the monarch, and if you still hold the crown at your end step, you get two 1/1 soldiers for more value
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Gates Ablaze and Skirk Fire Marshal skew toward the efficient end of these payoffs, providing an inexpensive means of doing a lot of damage to all creatures on the battlefield
Phyrexian Vindicator has the spite ability that redirects damage and enough white pips to turn on any relevant devotion card
In other words, though someone might open a fetch land in a Dragonstorm booster pack, fetches will not be legal in Standard, the card games flagship competitive format