Tablet Fragment

Not to be confused with the Solar Tablet Fragment.

The Tablet Fragment is a pet summon item with a 25% chance to drop from the Lunatic Cultist in Master mode. It summons a Phantasmal Dragon pet that follows the player. It resembles the Phantasm Dragon spawned during the Lunatic Cultist boss fight.

Trivia

 * The item sprite appears to be a piece of the Solar Tablet, but grey/gray instead of brown.