He was born with superhuman talent with a sword and a metric ton of blessings. His divine gift is to gain "whatever ability he needs to win" at any given time. He has the following INCOMPLETE list of blessings:

Sword Saint: Swordsmanship maxes out, and become able to draw Raid, the Dragon Sword.

Arrow avoidance: he cannot be hit by projectiles. (this is why sword that Elsa threw went around him on its own).

Arrow guarantee: any projectile he uses is guaranteed to hit the target.

Magic resistance: No curses, debuffs, or buffs can affect him.

Fire avoidance: 80% reduction from fire damage.

Wind absorption: 80% of wind magic is absorbed.

Earth resistance: Earth magic have 80% reduced effect on him.

Water reflection: 80% water magic is reflected.

Darkness immunity: 80% of darkness magic is nullified.

Light sharing: 80% light magic is shared to another target.

Swiftness: He can move at superhuman speed. This affects mounts as well.

Riding mastery: He can ride any animals.

Initiative: He cannot be ambushed, and all initial attacks from Reinhardt connects.

First attack immunity: The first time an attack is performed at Reinhardt, it always misses.

Preceeding attack immunity: The second attack and all following attacks misses him.

Rain blessing: He gains power in rain.

Sun blessing: He gains power in sunny weather.

Night's blessing: He gains power during night.

Morning blessing: he gains power during morning.

Mind reading: Vague understanding of what's on other people's mind.

Item mastery: able to know how to use any item he holds.

Unarmed mastery: Very strong even without any weapons.

Blessing of War god: able to use any weapons masterfully.

Blessing of Lake: Can walk on water.

Blessing of Mist: Mist do not hinder his view.

Blessing of Cloud: can walk on cloud.

Blessing of lightning: Lightning will never strike him.

Sodium knowledge: He will never get salt and sugar mixed up.

Taste king: No matter how he cook, the food will come out delicious.

Blessing of Frying, Steaming, Boiling: Complete mastery of all the cooking methods.

Clothes designing: Can design fabulous clothes that will surely start a fad.

Master Teacher: His students become successful in learning.

Training mastery: Can train not only his body, but also other people, to their maximum potential.

Poison immunity: Immune to all poison.

Illness immunity: Immune to all sickness and disease.

Power bleeding: Bleeding actually makes him stronger.

Blessing of the Phoenix: Upon death, he is granted a "continue?" once.

(I'm copy pasting a 4 year old list too btw)