Power gems drop rate

Nanoo and Key Maker when you fix power gems drop? To upgrade just 1 item from 15 to 16 tier we need 99 power gems, from 16 to 17 more then 130. To lvlup Dragon 50 and more power gems. BUT POWER GEMS DROP JUST 1 FOR MORE THEN 130 RUNS ON DARK DUNGEON. How much time and stamina we need spent to upgrade 1 item or lvlup pet? U think it's fair? I think not. Hope u r not so greedy for "pay for enjoy play". It great game, but it need some fixes at same time. Good day sirs

During loading of video its showing .No more videos ads available. Kindly fix it. Drop rate of critical weapons is low & soal is less . Game is good but needs to fix these things to make this game much famous in worldwide