i think this is a great opportunity for those who missed the kirin and need a card to replace it. However i will not work as well as kirin does due to some reasons.
1) There is only one card that can replace kirin-gretel combo and that is atropos which requires 12k sailor miles
2) Even you get atropos with that ridiculous amount of sailor mile, it is hp type instead of balance and god race instead of dragon , this means that it will not be beneficial to use it with dragon kings/queens or shepperd dog leader(malovelent spell leader skill) combo. Furthermore even though there is a god type leader skill which makes their hp and attack power 2.5x of orginal , active skill of god type cards are not adaquate to build a team similar to dragon kings/queens builds or malovelent spell leader skill builds yet.
3) It is not possible to combine hecate with dragon leaders
4) Altough it will cause more damage to earth based cards (which is not important at all because earth ones will be dead anyway unless they recieve less damage) , it will cause less damage to water ones and this is pretty bad issue because it makes impossible to kill 70 level water raid bosses at once if you dont have a build that can take boss's %30 of hp before you use atropos-flaming hecate combo and this team still have a chance to fail. In fact , it is not possible to use %15 damage causer black beard or pinocchio anymore with hecate-atropos when attacking water raid bosses