If the plastic feels flexible, this can also be a sign that a real PSA slab was tampered with, and that the card inside may be fake
Set Number 173 Language Espaol Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (1/19/2018) Storm the Vault's first ability can trigger more than once in a turn if creatures you control deal combat damage at different times in a turn (most likely because one or more has first strike) or if creatures you control deal combat damage to more than one player at once
"The Century's Top 50 Handheld Games (Page 3)"
This card was inspired by a comment from one of my friends
At the beginning of each upkeep, if you had another creature enter the battlefield under your control last turn, draw a card