<p>I'm not sure if this is for all spells, but I found it on druid party spell:</p><p>The needed mana to cast spell depends on the amount of party members that will be affected. manacost=(0.9X−1∗120)∗X </p><p>(X affected. </p><p><strong>manacost=(0.9X−1∗120)∗X </strong></p><p><strong>(X = total party members within range, including yourself).</p><p>Example:</p><table yourself).</strong></p><p>Example:</p><table border="1" cellpadding="1" style="width:500px; border-spacing: 1px;"><tbody><tr><td style="width:500px"><tbody><tr><td style="text-align:center">Party members</td><td style="text-align:center">Mana needed</td></tr><tr><td style="text-align:center">2</td><td style="text-align:center">216</td></tr><tr><td style="text-align:center">3</td><td style="text-align:center">291</td></tr><tr><td style="text-align:center">4</td><td style="text-align:center">350</td></tr><tr><td style="text-align:center">5</td><td style="text-align:center">394</td></tr><tr><td style="text-align:center">6</td><td style="text-align:center">426</td></tr><tr><td style="text-align:center">7</td><td style="text-align:center">447</td></tr><tr><td style="text-align:center">8</td><td style="text-align:center">460</td></tr><tr><td style="text-align:center">9</td><td style="text-align:center">465</td></tr><tr><td style="text-align:center">10</td><td style="text-align:center">465</td></tr></tbody></table><p><strong>TibiaFandom - <a rel="nofollow" href="https://tibia.fandom.com/wiki/Heal_Party">link</a></strong></p>