My rebirth is hello

Disease and terror has hit Camelot. Darkness has struck the lands of Albion. No king or queen knows what to do against it.
Sorcerers all around the realms have heard of a legend, a myth. There is a spell which can give a sorcerer the power to save all of Albion, but no one has been able to handle it so far. Everyone who tried to bend the power of the spell, died a most painful death.

When a druid arrives in Camelot looking for Emrys, Merlin knows he has to for fill his duty as the most mighty warlock of all, but at what cost will it be?