When you purchase the Season Pass for Legend of Zelda: Breath of the Wild’s DLC, you’ll get a “Purchase Bonus” of three chests. The screen you see when you first fire up the game with the DLC installed will tell you that they’re scattered around the Great Plateau.
Be warned, you’re not going to find the Hylian rocket launcher in one of these chests. You’re going to find a new shirt, a few bomb arrows and a ruby. Luckily, they’re all found near (or right next to) shrines in purple chests marked with an “EX.”
Ja Baij shrine: Nintendo Switch shirt
Head to Ja Baij shrine in the Eastern Abbey of the Great Plateau. Turn about 45 degrees to your left, and look on top of the wall. Right there in the corner of the room, you’ll find your first purple EX chest. Open it up for the red Nintendo Switch shirt.
Oman Au shrine — Ruby
The easiest of the three to find is the chest at Oman Au shrine in the northeast of the Great Plateau. It’s right there on the ground immediately to the left of the shrine. Kick it open for a ruby.
Keh Namut shrine — Five bomb arrows
When you arrive at Keh Namut shrine, turn to your right and run around to the back side of the shrine. Look to the southwest, where you’ll see the chest on a rooftop below you. Paraglide or climb down to claim your five bomb arrows.