Board Thread:Questions and Answers/@comment-26021614-20150723012815/@comment-26197892-20150723013018

Almighty Imp Arton can only be used as long as all other stats are not CAPPED yet. i.e arton gives  HP by 150, Atk, Def and Rec by 60 when fused to a unit. If Kanon is only 100 away from being maxed for HP you wouldn't be able to use imp arton on Kanon