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Isaac, being rather shy, didn't introduce himself to Carlyle. Seeing Cassandra's discomfort, he took a few hasty steps away, thinking that maybe his residual REF was causing her discomfort. Better not to have these people not liking him, right? But what if they needed cover and he was out of position? Ahhh, this was hard!
The problem resolved itself when Carlyle called them into the circle. Isaac stepped into it, his REF still deactivated, and fell through the floor, facing the direction Cassandra had indicated.
Once they landed (Isaac felt almost no impact from the floor, since his legs had basic shock absorbers and the fall had only been a few feet), Isaac skipped to the right, so that the group was between Ty and himself. He raised his arms and began to launch lead slugs at the Tyrgani patrol.

Isaac turned his attention to the blood mage and the light guard, since his current slug throwers were not powerful enough to disable powerarmor unless he hit a joint. And he, of course, was not confident enough to try taht just yet.
He sprayed rapid bursts of lead at his aforementioned targets.

Isaac froze for a second. Oh no. Oh no no no. This was bad.
Ty was now trusting him. Clearly, someone needed to end those powersuits. Ty was not equipped either, and he needed Isaac to do it. Failing would make Isaac a disappointment to Ty.
But he couldn't avoid doing it in order to avoid humiliating himself. Doing so would only serve the same purpose.
What to do? What to do?!
His choice was made. Ty was moving; if Isaac didn't do what Ty expected, then Ty would probably die. And that would make Isaac feel like s**t, you know?
So he knelt. He activated his magnets to ensure he was steady. He focused his eyes, which were actually ocular implants. He drew several beads on the joints of the powersuits. Controlled bursts from the weapons in each arm meant that he could hit four joints on each powersuit before he had to stop firing, both to control recoil and check for a result.
Final checks: Complete.
Guns: Ready.
Targets: Acquired.
Fire!
Isaac aimed for the shoulder and elbow joints of each powersuit. If he could disable those, then they couldn't get their guns up to kill Isaac's companions. Oddly, he didn't even think about his own dying.
He stopped firing. He had to see the result before he continued. He was ready to do so, however.

Instead of panicking like usual, Isaac's "gaze" (and thus, his targeting) flicked to the grenade, then his guns followed. He had snapped the nade out of the air before he had even had time to be a pansy about it.

As the white phosphorus ignited, Ty lunged past it successfully. The blood mage cried out and dropped onto his back, throwing his arms into the way of Ty's attack. He was thrown to the gronud, arms bleeding profusely. The lightly armored guard swung the stock of his rifle at Ty's head.

The power armors reacted reasonably well to being lit on fire by a dangerous chemical, taking one hand from their guns to do what seemed to be a series of hand signals.

"The Captain says, 'Do something about their hands and they can't control half their systems!' " Carlyle called out, holding his left hand to an earpiece on the goggles.

Ty dropped to the ground, holding his body inches above the floor to get out of the infantry's line of fire, and lunged with a wild, animal grin at the retreating mage, slashing at his chest.

While the power armors were stumbling, Isaac took the opportunity to fire inside of their scrambled defenses and hit their freaking hands and arms.