Your carry weight and ability to lift and push is calculated as that of one size larger

Darkvision out to 120ft.

A Fire Orc is limited to 4 schools of magic.

Score Increases

Charisma increases by 2
Constitution increases by 1

Your lineage from a fire giant has granted you an affinity of fire and the mental arts that has no peer. 

At level 1 Your blood grants you resistance to fire damage

At level 4 Your fire heritage has grown stronger, your to-hit and spell save DC for spells and cantrips have increased by 1.

At level 7  Your Blood has grown thick with the fuel of fire. You are now immune to fire damage.

At level 11 Your heritage is making itself stronger with an increased level of heat, your to-hit and spell save DC for spells and cantrips have increased by 2.

At level 16 Your blood has fused with the essence of fire. Your spells are at the height of their power, your to-hit and spell save DC for spells and cantrips have increased by 3.

At level 20 Your fire blood allows you to ignore resistance to fire and psychic damage and immunity is treated as resistance.