Magmapede (arthropod mob concept)

Attributes:

Health points: 30 (15 hearts)

Armor points: 2

Spawn zone: In the Nether, around the level of lava oceans, and lower. Mostly seen on magma beaches.

Appearance:  It looks something like this

Attack strength:

• Easy : 4 damage
• Normal: 4 damage (inflicts burning for 6 seconds)
• Hard: 6 damage (inflicts burning and poison at the same time for 8 seconds)

Misc:

• They roll into a ball like roly polies when they have 6 HP or less, and will alert closer Magmapedes.
• They are immune to fire damage, lava and poison.
• As they're arthropods, they take the bonus damage when attacked with a "Bane of arthropods" enchanted item.
• They drop Spider eyes and Magmapede scales, which can be used to craft a red scaly armor, that kinda looks like this https://i.pinimg.com/564x/c6/31/29/c6312978e61059cb7979b4cca47e3ef8.jpg 
• This armor is as strong as Iron, but less durable.