| Name | Edition | Colour | Type | Cost | Power | Rarity | $ |
|---|---|---|---|---|---|---|---|
| Aura Finesse | RE | Blue | Instant | U | Common | 0.12 | |
| Caller of Gales | ZE | Blue | Creature - Merfolk Wizard | U | (1/1) | Common | 0.12 |
| Cerulean Wisps | SM | Blue | Instant | U | Common | 0.15 | |
| Cosi's Trickster | ZE | Blue | Creature - Merfolk Wizard | U | (1/1) | Rare | 0.64 |
| Crab Umbra | RE | Blue | Enchantment - Aura | U | Uncommon | 0.19 | |
| Cursecatcher | SM | Blue | Creature - Merfolk Wizard | U | 1/1 | Uncommon | 2.41 |
| Defensive Stance | NP | Blue | Enchantment - Aura | U | Common | 0.15 | |
| Diminish | M11 | Blue | Instant | U | Common | 0.11 | |
| Dispel | WW | Blue | Instant | U | Common | 0.18 | |
| Distortion Strike | RE | Blue | Sorcery | U | Common | 0.28 | |
| Drowner Initiate | SM | Blue | Creature - Merfolk Wizard | U | 1/1 | Common | 0.15 |
| Enclave Cryptologist | RE | Blue | Creature - Merfolk Wizard | U | 0/1 | Uncommon | 0.27 |
| Fleeting Distraction | RE | Blue | Instant | U | Common | 0.12 | |
| Flight | M12 | Blue | Enchantment - Aura | U | Common | ||
| Hedron Crab | ZE | Blue | Creature - Crab | U | (0/2) | Uncommon | 1.23 |
| Kraken Hatchling | ZE | Blue | Creature - Kraken | U | (0/4) | Common | 0.14 |
| Merfolk Spy | M11 | Blue | Creature - Merfolk Rogue | U | 1/1 | Common | 0.11 |
| Phantasmal Bear | M12 | Blue | Creature - Bear Illusion | U | 2/2 | Common | |
| Ponder | M12 | Blue | Sorcery | U | Common | ||
| Preordain | M11 | Blue | Sorcery | U | Common | 0.62 | |
| Quest for Ancient Secrets | ZE | Blue | Enchantment | U | Uncommon | 0.23 | |
| Quest for Ula's Temple | WW | Blue | Enchantment | U | Rare | 0.56 | |
| Shared Discovery | RE | Blue | Sorcery | U | Common | 0.12 | |
| Skywatcher Adept | RE | Blue | Creature - Merfolk Wizard | U | 1/1 | Common | 0.12 |
| Spell Pierce | ZE | Blue | Instant | U | Common | 0.46 | |
| Steel Sabotage | MB | Blue | Instant | U | Common | 0.12 | |
| Tome Scour | M11 | Blue | Sorcery | U | Common | 0.15 | |
| Training Grounds | RE | Blue | Enchantment | U | Rare | 1.62 | |
| Unsummon | M11 | Blue | Instant | U | Common | 0.11 | |
| Unsummon | M12 | Blue | Instant | U | Common | ||
| Vapor Snag | NP | Blue | Instant | U | Common | 0.15 | |
| Visions of Beyond | M12 | Blue | Instant | U | Rare | ||
| Wind Zendikon | WW | Blue | Enchantment - Aura | U | Common | 0.12 |