If this card is Ritual Summoned: You can shuffle up to 3 Spell/Trap Cards your opponent controls into the Deck, then you can Special Summon 1 Level 4 or lower Spirit monster from your Deck, ignoring its Summoning conditions
Meloetta #167 ($44.69) The Psychic/Normal-type Mythical Pokmon ex brings melodic abilities and a vibrant illustration rare, making it a fan favorite for both battles and collections
This could be a potent component for a day/night switching deck where you amass 3+ triggers each time, but we can do better than a Horned Turtle that might accidentally let your opponents werewolves enter on their Nightbound side
(1/19/2018) In a Two-Headed Giant game, if you control more than one creature that can attack, you attack different opponents so that Storm the Vault's first ability triggers twice.
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