Using the sketchbook, Cassidy can unlock new items. Ideas are found in the game.
| Name | Type | Cost |
|---|---|---|
| Shadow Spire | Lucid Attack | 2 |
| Vanity Mirror | Keepsake- Randomly duplicates an equipped keepsake | 2 |
| Shadow Step | Shoes | 2 |
| Astral Hop | Shoes | 2 |
| Radiant Shield | Shield | 2 |
| Breaker Sword | Melee Weapon | 2 |
| Paper Airplane | Ranged Weapon | 2 |
| Raijin | Melee Weapon | 2 |
| Megaton Stingers | Melee Weapon | 2 |
| Pool Cue | Melee Weapon | 2 |
| Blowback | Shield | 2 |
| Fire Bird | Keepsake - revives on death with 50% Health. | 2 |
| Biting Dagger | Melee Weapon | 2 |
| Telekinesis | Ranged Weapon | 2 |
| Art Supplies | Keepsake - doubles Inspiration gained. | 2 |
| Storm Ward | Shield | 1 |
| Power Chord | Lucid Attack | 4 |
| Lightning Strike | Lucid Attack | 4 |
| Mallory | Melee Weapon | 4 |
| I Don't Know How to Leave | Lucid Attack | 4 |
| Treasure Map | Treasure Map - reveals dungeon layout. | 4 |
| Frisbee | Ranged Weapon | 4 |
| Vampire Fangs | Keepsake - recovers Health when dealing damage | 4 |
| Bonsai-Do | Keepsake - improves Parry Projectile Damage. | 4 |
| Lightspeed | Shoes | 4 |
| Ground Surge | Lucid Attack | 4 |
| Bungee Cord | Keepsake - improves Projectile Speed. | 4 |
| Imported Candy | Keepsake- Increases the level of a piece of equipment | 8 |
| Oil Slick | Lucid Attack | 8 |
| Geyser | Lucid Attack | 8 |
| Speed Bag | Keepsake- Removes time ability cooldown when making melee attacks | 8 |
| Glitter Bomb | Ranged Attacks | 8 |
| Skyfall | Lucid Attack | 8 |
| Warding Winds | Shield | 8 |
| Koregan | Melee Weapon | 8 |
| Whirling Current | Melee Weapon | 8 |
| Bike Chain | Keepsake - increases effect chaining. | 8 |
| Bandage | Keepsake - increases Health recovery by 10%. | 8 |
| Crimson Shield | Shield | 8 |
| Umbrella | Melee Weapon | 8 |
| Release | Lucid Attack | 8 |
| Detonate | Lucid Attack | 8 |
| Voltaic Ray | Ranged Weapon | 12 |
| Fishing Pole | Melee Weapon | 12 |
| Flame Shield | Shield | 12 |
| Radiant Edge | Melee Weapon | 12 |
| Quiver | Keepsake- Reduces ranged lucid cost | 12 |
| Piggy Bank | Keepsake - increases Sand gain by 10%. | 12 |
| Blowgun | Ranged Attack | 12 |
| X-Ray Specs | Keepsake- Reveals secret rooms | 12 |
| Medicine Ball | Ranged Weapon | 12 |
| Shivering Sphere | Lucid Attack | 12 |
| Paycheck | Keepsake- Increases damage the more sand held | 12 |
| Firecracker | Ranged Weapon | 12 |
| MoneyTree | Keepsake - consumes original Sand but increases future gain. | 16 |
| Terracade | Lucid Attack | 16 |
| Overdrive | Lucid Attack | 16 |
| Fast Food | Keepsake- Adds oiled to all attacks | 16 |
| Seismic Wave | Lucid Attack | 16 |
| Lightning Storm | Lucid Attack | 16 |
| Dusted Blanks | Keepsake- Increases ranged lucid cost, but increases sand gained | 16 |
| Honey | Keepsake- Doubles all companions | |
| Dent Puller | Keepsake - applies Health recovery on a successful parry. | 20 |
| Key Cutter | Keepsake | 20 |
| Soda & Mints | Keepsake | 20 |
| Health Insurance | Keepsake | 20 |
| Face Mask | Keepsake - gets rid of status effects. | 20 |
| Booster Shot | 20 | |
| Red Beard | Melee Weapon | 20 |