rolled 4, 2, 6 = 12
You reach him, shouting for support. Infantry pour out of the trenches, holding bunches of grenades. All at once, you empty the bag of thermite over his fallen form, even as the armor begins to seal, shoving one or two into his gaping wounds for good measure. Tendrils emerge from the glimmering metal, but you slice them away, freezing them with your aura and cutting him into ever smaller pieces.
With your aura at maximum, you freeze every part you can see, binding the magnesium fuses together and attempting to transmute his body into iron.
It doesn't work. You light the now-single fuse with a shock from your storm knives, and back up, shielding your eyes and cutting your aura. You hear more laughter as the infantry reach you.
The adversary speaks, his voice seeming to come from all around. “Oh, Maya. You're so thorough. Just like the time we first met.” His armor begins to melt. “I really wish we could have spent more time together.” His voice fades, filtering into the air. “But you just had to break it, didn't you? No fun at all.” It becomes a whisper, seeping away. “See you soon, giantess.”
You retreat, pulling the infantry back with you. The adversary's flesh bubbles away, his blood boiling into a black cloud. His armor, its orange glow no longer visible, melts completely, filling the shrapnel holes and burning up the fallen arrows. You hear nothing more, nothing but the restrained voices of your comrades.
“Is it over?”