User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-2601:87:8300:20D0:E8C5:2AE0:7FEB:DD9E-20190202104335/@comment-2600:1702:3600:12F0:A974:2962:6CDA:9D19-20190203174002

your wrong its stated by Ravel that Invald power is unstable durning training camp before the rating game with Rias

most likely due to the sleeping sickness Ingvald is having

if Ingvald is going to do the rating game she needs to be cured first

this probly wont happen untill some time in volume 3 then we will know what happens if her power stabilizes or not