William let one of his monstrous weapons bring the melted piece of alloy that he left aside all this time, before slowly and carefully pouring it into the ready mould.
He dropped his blood over this, making himself the true controller of this Troll. It was just a failsafe measure, one he hoped not to use at any time.
Using this link, he could give the order and this Troll's Heart would detonate. It'd be an apocalyptic event, one he wished to never use at all.
Once the melted alloy filled the gaps in the moulds, he didn't leave it to cool down. Instead, he forcibly opened the alloy, and placed the ball inside, before asking all of his monstrous weapons to come and hammer this.
It was a weird way to forge this core of the Troll, but it was the only way to make sure the melted alloy would mix and link itself with the Heart of the Troll.
