It's a slow and roundabout way to establish a board presence, but now you have two 5/5 creatures
While this can be a little dangerous (especially against Phelddagrif decks), you can harness this effect to enable some extra mana for cards like Vampiric Tutor, Entomb, Infernal Grasp, or Village Rites while still tapping all your lands on your turn
Most collectors who break even or profit from sealed product opening are doing it on sets with multiple high-value SIRs (Charizard SV151, Umbreon Prismatic Evolutions) rather than sets with one flagship SIR and bulk filler
The latter will deal damage to a player when they cast a noncreature spell
Hashaton's ability lets you make 4/4 copies of Creatures you discard, multiple times a turn if you so wish
An artifact-focused machine deck