| Name | Cost | Price |
|---|---|---|
| Inventors' Fair | $16.37 | |
| Inventor's Goggles | $0.10 | |
| Inventory Management | $6.46 | |
| Inverter of Truth | — | |
| Invert // Invent | $0.11 | |
| Investi-Gate | — | |
| Investigator's Journal | $0.31 | |
| Invigorate | $0.30 | |
| Invigorated Rampage | $0.24 | |
| Invigorating Boon | $0.12 | |
| Invigorating Surge | $0.24 | |
| Invisibility | $0.09 | |
| Invisible Force Field | $2.95 | |
| Invisible Stalker | $0.75 | |
| Invisible Woman, Sue Storm | $0.24 | |
| Invoke Calamity | $0.49 | |
| Invoke Despair | $0.33 | |
| Invoke Justice | $0.26 | |
| Invoke the Ancients | $0.27 | |
| Invoke the Divine | $0.37 | |
| Invoke the Winds | $0.38 | |
| Iona, Shield of Emeria | — | |
| Ionize | $0.84 | |
| Ion Storm | $0.15 |