See the table first.
Every rarity lane is published before you open, so the suspense never depends on hidden rules.
HoloDrop / First Light
A single Pokémon pack, opened in public. Published odds, a server-drawn outcome, and a pull record saved the instant the reveal lands.

The opening

The HoloDrop promise
Every rarity lane is published before you open, so the suspense never depends on hidden rules.
Your browser asks for a pack; it never sends a card, rarity, or winning outcome.
The revealed card and its pack result are written together before success reaches your screen.