Faien frowns, muttering "Looks like the trouble's found us after all," and raises his hand to the sky, a pale blue blade shrouded in mist appearing between eyeblinks in his grasp. His voice rings out over the forest with his next words, far clearer than he has used before in your presence.
"Let it be known from the start that you will be spared if and only if you surrender. Drop your weapons or die." As both of the creatures nock arrows again, he nods sharply, kicking his horse into motion. "I'm sure you know a signal when you see one," he calls back to the others as his mount struggles up the slope. "Stay with Sir Sol until we flush out the rest of these fools."
Plunging into the forest, his toughened skin and armour allowing him to ignore its barbs and thorns, Faien raises the blade over his left shoulder, a crackle of electricity running through it as he slices down at the archer in a narrow arc.
SpoilerThis is, of course, assuming they don't surrender when asked, which I figured was a safe bet.
Move: Draw sword.
Ride to D10/E11.
Standard: Attack, charging the blade using the Lightning Gauntlets.
Attack: (1d20+6)[19]
Damage: (1d8+5)[7] (Edit: +3, sorry, so 5) + (4d6)[17] electricity