... yeah this has deal with the devil written all over it. even then does the "rescued" party even have a choice in the matter? yoinked to an unknown location in a potentally hostile stronghold with no obvious way back. issolated from support networks to make "convincing" the individuals easier. screams cult indoctranation 101 to me.
as for the dubi-drug, no way that things a risk free, i see a few outcomes all leading in dependency and loss of autonomy.
it works as advertised for a bit gets worse over time while quietly erroding the users natural abilitys requiring more drug to just function nominaly.
it doesnt work at all and is just a device to ensure complience somehow via its withdrawll while the abilitys are granted on loan by the goddess.
it works as advertised with the cavet it warps your mind to the point of outright brainwash... perhaps with shades of mindbreak on long term use or withdrawl.