Apprentice armor

The Apprentice armor is a Hardmode magic and summoning armor set purchased from the Tavernkeep, which consists of the Apprentice's Hat, Apprentice's Robe and Apprentice's Trousers.

The total bonus to max number of sentries is +2, allowing 3 to be summoned at once. The Dark Artist armor can be considered a direct upgrade of the Apprentice armor.

Trivia

 * Not counting the regenerative variant of Spectre armor which has negative bonuses, Apprentice armor has the lowest combined magic damage and critical strike bonuses of any magic-based armor set in the game.