Ira Tenax

Male sit tibi tenebrarum rex
ab initio ad finem sacra ultio
cruenta pugna et epicus furor
contra mali discipulos

Ad perpetuam gloriam lucis
furor ira tenax
contra iniuriam et ruinam
rabies ira tenax

Male sit tibi tenebrarum rex
cruentus rex

[English translation:]

May there be misery for you, king of darkness
From the beginning to your holy end
Cruel fights and epic fury
Against disciples of darkness

For the eternal glory of the light
The everlasting furious rage
Against injustice and ruin
The eternal furious rage

May there be misery for you, king of darkness
Cruel king.