Because it's funny.....

Death Armadillo

Death Armadillo: Init +5; Atk Bite +3 melee (1d6) or tail lance +2 melee (1d8); AC 16; HD 2d8; MV 20’; Act 2d20; SV Fort +5; Ref +5; Will +5; AL C.

What else is there to say? It's faster than you, likely to hit your unarmored ass with both attacks, and has a nasty tail lance. The bones in the lower left corner are likely its last victim. The snake coming down the stairs might even be venomous.