Nils gets Martin to try a loop too many, causing him to crash and need days to recover, which would ruin the geese migratory planning. Nils calls a magical marker from elf Lina who promised help any time and comes, but proves so clumsy at healing that she even transforms Martin in a sick frog. She does now a cure: mandrake, but that root is only cultivated in the forest by the black elf, to magnify his dark magic power. Nils takes the elf along to steal it from him, starting a fight a chase during which the roots are wrecked, yet Nils was prepared.
—KGF Vissers