Thanks for your suggestions. Unfortunately both cards are not supported by the current game system.
In release 1.75, we've started to document the status of missing cards, if you open up Magarena/scripts_missing/Dromoka_s_Command.txt it contains "status=not supported: multi-choice-modal" and Magarena/scripts_missing/Hardened_Scales.txt contains "status=not supported: when-counter-placed"
This means these cards use a mechanic which is not supported currently, thus requiring significant effort to implement. Cards which says "status=needs groovy" have a much better chance of being implemented for the next release.
Regards,
Melvin