Stirge and the other Mercenaries

Of the 31 mercenaries he sees ( 4 are seriously wounded and 1 dead ). He sees 6 heavily loaded with magical items. On the rest he notices a small collection of minor items of magic. Looks like 7 have potions strapped to easy access loops on their clothing. Two carry magical weapons and one wears a magical ring.

Stirge is really a half drow. You recognize him as the half drow lieutenant from Sorg from the short view you had of him at the Yawning Portal.
On the other six Deethan notices one that has almost every exposed piece of gear radiating magic of a strong nature ( this would be Stirge). Rings, wands, vest, belt, gauntlets, boots, backpack, daggers, javelins, short sword, cloak, scroll pouch, headband (NOTE IT IS INVISIBLE), chain armor, and lots of items in various pouches. He is also eveloped in several magical radiances from active spells: SPELL IMMUNITY, GREATER MAGICAL WEAPON, FREEDOM OF MOVEMENT, 4x PROTECTION FROM ENERGY, MAGICAL VESTMENT, MAGICAL CIRCLE AGAINST LAW, UNDETECTABLE ALIGNMENT, DELAY POSION, and NONDETECTION

One of the others has 2 potions strapped to him, a wand, chainmail armor, 2x ring and a powerfully glowing pouch at his belt. He glows with a prepared spell 2X CURE LIGHT WOUNDS, CURE MODERATE WOUNDS

One of the others has leather armor, weapon, 2x ring and what appear to be a pair of scrolls stuffed into his belt. He glows with a prepared spell 2X CURE LIGHT WOUNDS, CURE MODERATE WOUNDS

One of the others has very powerful bracers, a wand, a potion, a ring and a powerfully glowing pouch. She glows with a prepared spell 2X CURE LIGHT WOUNDS, CURE MODERATE WOUNDS

One of the others has a powerfully glowing weapon, a pair of potions, ring, studded leather armor, and a scroll case.

The last has a wand, 2x ring, and a potion.