Arsenne shifts 5' North, so that he is with arm's length of Kaen and Thikha'Ness.
He then uses his Glaive to strike at the aphid with a powerful short, downward, circular slash and says firmly: "Aphid rainbow Drop!"

If he cannot strike between his two teammates and he realizes it on time, he will then instead let go of Glaive with his lead hand (the left), and touch Kaen on his right shoulder while saying "May Shelyn's own luck bless you on your next try."

Spoiler: Crunch
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Attack, risky strike (d20+5)[24] damage [d10+9]
Or
Bit of Luck (Sp): You can touch a willing creature as a standard action, giving it a bit of luck. For the next round, any time the target rolls a d20, he may roll twice and take the more favorable result