Forgotten (game changing) mechanics of certain spells Two that come to mind is Asta’s sword that can absorb magic attributes and shot it out and Noelle’s Valkyrie lance being able to hijack spells it is in contact with. 

Both are super broken properties but barely get used after his fight with Mars. When Licht had Asta’s sword he used it to absorb Yuno’s wind magic and reflect it back. Asta was even on the receiving end of this but even when he got the sword back he never used it.  This would allow him to use magic attributes he normally can’t use and would go a long way to making him more versatile in defense and offense. 

Noelle’s water lance was able to hijack Kivn’s magic just by touching it. This seems really broken, almost like Noelle’s version of anti magic. But ever since that fight this property is barely mentioned at all. Why?