Rune Giant

Constant Spells — A constant spell affects the monster without the monster needing to cast it, and its duration is unlimited. If a constant spell gets counteracted, the monster can reactivate it by spending the normal spellcasting actions the spell requires.

Reactive Strike (Special) — The rune giant gains an additional reaction at the beginning of each of their turns that they can use only for a Reactive Strike.

Trigger A creature within the monster's reach uses a manipulate action or a move action, makes a ranged attack, or leaves a square during a move action it's using.

Effect The monster attempts a melee Strike against the triggering creature. If the attack is a critical hit and the trigger was a manipulate action, the monster disrupts that action. This Strike doesn't count toward the monster's multiple attack penalty, and its multiple attack penalty doesn't apply to this Strike.

Command Giants — When a rune giant casts a mental spell against another giant, the DC is 39, rather than 35

Demand (arcane, mental) — When a rune giant casts their innate Sending spell, they can also cast Suggestion on the target.

Flashing Runes (arcane, light) — Critical Success The creature is unaffected.

Success The creature is Dazzled for 1 round.

Failure The creature is Blinded for 1 round.

Invoke Rune (arcane, concentrate, electricity) — The rune giant invokes one of the runes on their body, causing the rune to spray forth a 30-foot cone of sparks that deals 6d12 electricity damage to all creatures in the cone (DC 37 Reflex save).

The giant can't use Invoke Rune again for 1d4 rounds.

A glowing copy of the invoked rune appears on a single weapon the giant holds, granting the weapon one effect listed below of the giant's choice. The effect on the weapon lasts for 1 minute. If the giant places a new rune on a weapon, any previously placed rune immediately vanishes, ending its effect.

Rune of Destruction The weapon gains the deadly trait with three weapon damage dice of the same die size as for the base weapon, and a creature hit with the weapon is Drained 1 unless it succeeds at a DC 35 Fortitude save.

Rune of Flames The weapon deals an additional 3d6 fire damage on all attacks.

Rune of Smiting When the weapon hits, the giant can Push the target back 10 feet, or 20 feet on a critical hit.

Rune of Space During the rune giant's turn, the weapon's reach is increased to 60 feet.

Wide Swing — The rune giant makes a single greatsword Strike and compares the attack roll result to the ACs of up to two foes within their reach. This counts as two attacks for the giant's multiple attack penalty.