Soft control cards are always welcomed in my book. Though high cost AND complete drain of quanta might be too much considering you're freezing your own creatures too.
actually, i believe the contrary. if it wasnt your own creatures, it would be too OP, also if it was a normal set value of quanta needed like say 10
or more, it would be OP, however by sacrificing all
quanta, i think it's balanced, since this effect only affects the current creatures on the field, you could just summon more creatures after that ice age, question though, if u used ice age again to freeze another bunch of creatures while there is still some frozen, does it restart the counter for the other creatures aswell? if so then in my opinion its almost OP if it wasnt for the "All
" sacrifice bit
awesome idea though, i like it