14 challenge amulets are possible without premium, they're a good challenge, AND VERY HARD.
if you have premium its easier, you can try using NO PREMIUM SETTINGS if you want the challenge
once you get maxed wild gem, use mana pool as much as possible and sell you're wild gem(you should have enough focus). this will get enough mana to buy/make a grade 5 or 6 gem!
start at 3/5.-1 for short range -1 for needing to rotate -2 for having no restart or pause button on a tower defense game -1 for music(i mute my speakers, because then it would be -2) -3 because THE GAME IS BORING!!! lets see 1+1+2=4 4+1+3=8 4+8=12 3-12=-9 -NINE STARS!!!!!!!!!
 "DuckLife3: Evolution"){kind=icon}
 "GemCraft Labyrinth"){kind=icon}
 "Music Catch 2"){kind=icon}
 "Fade"){kind=icon}
 "Gravit-Eye"){kind=icon}
 "Wyzau Circle TD"){kind=icon}
 "Upgrade Complete 2"){kind=icon}
 "Multitask 2"){kind=icon}
 "GemCraft chapter 0"){kind=icon}
 "Ultimate Defense"){kind=icon}