Number 68: Sanaphond the Sky Prison

Number 68: Sanaphond the Sky Prison debuted in the 2017 Mega-Tins, which were designed to reprint some of the most sought-after cards from the previous year's booster sets, specifically from the Yu-Gi-Oh! ARC-V era. The card was originally introduced as a Rank 8 Xyz Monster, characterized by its ability to manipulate the graveyard and lock down special summons, serving as a tactical tool for decks capable of fielding high-level monsters.

The design of Sanaphond reflects the intricate, mechanical, and ethereal aesthetic common to the Number series within the game. It was conceptualized to offer defensive utility in a meta-game environment where graveyard interaction had become increasingly prevalent. Upon its release in the Mega-Tins, it was well-received by competitive players who appreciated its accessible super-rare status as an alternative to higher-rarity printings, allowing for wider experimentation in tournament play.