speak corpse
You sprinkle a circle of pure sea salt around the corpse.

water indoor 1 AM>
You force the corpse into a position of supplication.
Kneeling before the body you place your open palm before its mouth.

water indoor 1 AM>
You whisper 'Li comando parlare dalla tomba...'
You whisper 'parlare a coloro che avete lasciato...'
You whisper 'Heed my call!'

water indoor 1 AM>
The corpse of a giant toad stirs. With a blood-chilling groan it opens its mouth to speak.
With a growl, the corpse of a giant toad utters 'Lament my fate!'
The corpse of a giant toad utters 'For Ithyssraya has robbed the dead and abandoned me!'
The corpse of a giant toad utters 'Return what is rightfully mine!'
The corpse of a giant toad utters 'And speak to me no more!'
With a rattling gasp, the corpse of a giant toad falls silent.

I'm 99% sure they looted their own corpse so the corpse's plight sounds a little weird and maybe needs to be reworded.