Fortified Soul

The magic that fuels a sorcerer comes from many places, and sometimes it comes from a strong soul, fortified with iron. Having such a strong soul may be from a bloodline associated with deity that rules over metal or war. Perhaps one of your ancestors became a god of battle or was pulled into a divine war. Or perhaps you were born under a specific star or sign that put you on this path. 

Those who have a fortified soul often go down the path of a warrior, never understanding why they are so good at battle and never unlocking their magic within. The few who do, become gods of the battlefield, able to devastate with both magic and might. Consider what lead you to unlock your magic, either a traumatic experience or extensive training.

Fortified Body

You have, despite your weaker body, undertaken the training to become a warrior. You gain proficiency in martial weapons, shields, light armor, and medium armor.

At 3rd level, you learn to defend yourself with magic. You learn the spells Shield and Absorb Elements, you know these spells, and they don't count against your spells known. As a reaction, you can spend 1 sorcery point to produce the effects of Shield or Absorb Elements.

Might and Magic

Starting at 6th level, you learn to mesh your martial and magic prowess together. Whenever you cast a cantrip, you can make a melee weapon attack as a bonus action.

Iron Smite

Starting from 14th level, you learn to fortify your melee weapon with intense magic for a short time, causing extra damage. When you make a melee attack, you can expend a spell slot of 1st level or higher to strike the target with intense magic, causing 2d6 force damage for a 1st level slot, and increasing by 1d6 per level of the spell slot, up to 5th level. You can only use this action once per round.

God of Battle

Starting at 18th level, you become a god of of battle. You learn Tenser's Transformation spell, you know this spell, and it doesn't count against your spells known. As a bonus action, you can spend 10 sorcery points to cast Tenser's Transformation, when you cast the spell in this manner, you automatically pass the constitution saving throw when the spell ends.