How is he parrying like this, barehanded?

<824hp 653m 628mv 19195tnl (0.29%)>
Haratzi has arrived.
You thrust your dagger towards Haratzi, attempting to sever his artery!
Haratzi's artery begins pumping out bright red bursts of blood!
Haratzi can no longer find the strength to wield the Dark Rod of Conquest.
A spray of blood erupts from Haratzi's wound!
Your deep gash injures Haratzi.
Haratzi has a few scratches.

<824hp 653m 628mv 19195tnl (0.29%)> art har

Moving out of Haratzi's range, you quickly jump back with a thrust!
Your poisonous bite injures Haratzi.
Sparks fly as an envenomed dagger strikes Haratzi's shield of electricity.
Haratzi parries your poisonous bite.
Your divine power decimates Haratzi!
Haratzi dodges your poisonous bite.
Haratzi has a few scratches.

<824hp 653m 628mv 19195tnl (0.29%)>
You deflect Haratzi's spell!
Your spellbane hits Haratzi.
You injure Haratzi.
Haratzi has a few scratches.

<824hp 653m 628mv 19195tnl (0.29%)> People near you:
(PK) Haratzi Central Main Area of the Mausoleum
(PK) Eulinda Central Main Area of the Mausoleum
Haratzi has a few scratches.

<824hp 653m 628mv 19195tnl (0.29%)> You thrust your dagger towards Haratzi, attempting to sever his artery!
A spray of blood erupts from Haratzi's wound!
Your deep gash injures Haratzi.
You parry Haratzi's freezing touch.
Haratzi parries your poisonous bite.
You deliver a blow of deadly force!
Your poisonous bite MASSACRES Haratzi!
Haratzi parries your poisonous bite.
Haratzi has some small but disgusting cuts.

<824hp 653m 628mv 19195tnl (0.29%)> bone

You deflect Haratzi's spell!
Your spellbane hits Haratzi.
You injure Haratzi.
You decimate Haratzi!
Haratzi parries your poisonous bite.
Haratzi has some small but disgusting cuts.

<824hp 653m 628mv 19195tnl (0.29%)>
Haratzi continues to bleed from his wounds.
Haratzi's bleeding artery injures him.
Haratzi has some small but disgusting cuts.

<831hp 660m 684mv 19195tnl (0.29%)>
You parry Haratzi's freezing touch.
Haratzi parries your poisonous bite.
Haratzi parries your divine power.
Haratzi parries your poisonous bite.
Haratzi parries your divine power.
Haratzi has some small but disgusting cuts.

<831hp 660m 684mv 19195tnl (0.29%)> You bring a silver studded mace around with bone-shattering force!
Your bone-shattering blow devastates Haratzi!
Haratzi has some small but disgusting cuts.

<831hp 660m 684mv 19195tnl (0.29%)>
You deflect Haratzi's spell!
Your spellbane hits Haratzi.
You wound Haratzi.
Haratzi parries your poisonous bite.
Haratzi parries your poisonous bite.
Haratzi has some small but disgusting cuts.

Even forgetting enhanced reactions and whatever bonuses a warrior gets, how is he parrying all those attacks?

Based on your log, I'd guess he had frost fingers up.

The touch spells allow for some parrying ability.