# Upgrade

You can upgrade to a higher-grade gem using the same gem. The success rate of the upgrade depends on the grade of the gems used.

<table><thead><tr><th width="129">Grade</th><th width="124" align="center">Rare</th><th align="center">Epic</th><th align="center">Unique</th><th width="113" align="center">Legend</th><th width="115" align="center">Myth</th><th data-hidden></th></tr></thead><tbody><tr><td>Upgrade</td><td align="center">Normal <br>x10</td><td align="center">Rare <br>x8</td><td align="center">Epic <br>x4</td><td align="center">Unique <br>x3</td><td align="center">Legend <br>x2</td><td></td></tr><tr><td>Success Probability</td><td align="center">75%</td><td align="center">80%</td><td align="center">85%</td><td align="center">90%</td><td align="center">30%</td><td></td></tr></tbody></table>