Warm-Up Tunnel (Japanese: 慣らしの洞穴 Warm-Up Cave) is a part of the Isle of Armor in the Galar region. It connects to the Training Lowlands to its south and the Potbottom Desert to its north.
Unless otherwise stated, hidden items in the Isle of Armor regenerate every day. In many of these cases, they can also regenerate as different items.
Every item that regenerates every day can also rarely regenerate as a Wishing Piece (at approximately a 1% chance).