Multiattack

The giant makes two warhammer attacks.

Warhammer

Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.

Rock

Ranged Weapon Attack: +6 to hit, range 40/160 ft., one target. Hit: 15 (2d10 + 4) bludgeoning damage.

Runic Blood (3/day)

Thursir giants can inscribe the thurs rune on a weapon. A creature hit by the weapon takes an additional 1d8 lightning damage, and the target can't take reactions until the start of its next turn. The thurs rune lasts for one hour, or for three hits, whichever comes first.