Fix Fire Pillar skill to not consume Gemstone if VIP or use Mistress card (#7623)

src/map/skill.cpp

@@ -18461,7 +18461,7 @@ struct s_skill_condition skill_get_requirement(map_session_data* sd, uint16 skil
 				}
 				else {
 					// Process level_dependent requirement
-					if (level_dependent && skill_lv <= MAX_SKILL_ITEM_REQUIRE) {
+					if (level_dependent && skill_lv <= MAX_SKILL_ITEM_REQUIRE && i == 0) {
 						req.itemid[0] = skill->require.itemid[skill_lv - 1];
 						req.amount[0] = skill->require.amount[skill_lv - 1];
 					}