No, even if it is too low, you will be told you didn't find anything, in some way. You just haven't done the thing that triggers it yet.
Hisssa comes out from under the wagon, grumbling about getting tossed around in his pouch and then being asked to bite the gross cork again in the tracker's mind. But the projection Sssil sends him gets through, and he too seems concerned about saving Thessan's life. He quickly slithers over to the proffered flask that Westian is holding. This time the elf manages to not jump as the snake's long fangs strike right next to his hand, although Sssil notices his already pale skin gets even lighter. Hisssa closes his eyes as he injects his venom through the cork. The whitish fluid dribbles down the side of the glass, and then the viper works his fangs free by lifting one side of his jaw than the other. He opens and closes his mouth a few times, and then slides back under the wagon to sulk some more.
The elf holds the flask up to the sun and peers at it. He closes his eyes and concentrates, murmuring words in his native Elven. Everyone sees odd drops of water appear on his forehead and run down his face, and his normally upturned mouth compresses into a flat line. Slowly, the venom takes on a green tint and begins to multiply in the bottom of the flask. The elf appears to be under a great deal of strain, although eventually he open his eyes and smiles at the flask, swaying where he sits.
"Zhhhat was zee lazzt uhf my mahna." he says weakly. He tries to get to his feet, but collapses on his side. "Aye feer Aye cahnoht ghet oop." Kalissa rushes over to him and takes the flask from his hand. "I'll do it. You rest. I know how hard it is when you must squeeze the last bit of mana from yourself.' she tells him.
The elf nods gratefully and lays down right where he is in the mud. Within seconds his eyes close and he is asleep.
At Sssi's nod Growlgra quickly wraps the thin cord arond the bottom of the pulsing growth, pulling his lips up in distaste as he touches the thing. Everyone nearby can see it is actually shaped kind of like a mushroom, with a stalk of vessels and nerves attaching it to the web growing through Thessan's body. The bika pulls the cord tight enough to nearly cut into the stalk and ties a strong knot in it. The tissue becomes an even darker purple as the blood flow inside it is restricted. The blue vessels surrounding the growth get paler and flatter.
Vaathi takes the small glass-like cube in her hand and brings it up to her face under her hood where she does...something...to it. After a few seconds, she brings it back and it is now steaming in the warm swampy air, as if it is incredibly cold. She applies it to the growth, and everyone can see the tissues shrink and turn paler as they come in contact with the thing. The chunk of cube gets a strage white frost coat on it, probably as it freezes the moisture in the air onto its surface. Vaathi rubs it all around the stalk and Growlgra's cord, ocassionally bringing it across the main surface. The cube continues to steam and grow smaller, although it does appear to be having some effect on the lump as the pulsing grows slower and the vessels smaller on its surface. Between the tying and the cold, it has seem to slow the network of thread-like veins spreading up Thessan's shoulder's and neck to his face.
And Vaathi has portable dry ice! Woo! Amazing creature, really. Wonder if you'll ever find out what she *is*? 
After that is done, her heavily hooded head nods to Kalissa. "The cold will not lassst long in thissss heat. Hurry." the odd mage says.
Kalissa steps forward, the uncorked flask in one hand and a small pad of soft cloth in the other. She looks down at her unconscious mate, the disgusting growth in the center of his chest.
"My mate. If this doesnt work, I am sorry. But I know you would have wanted us to try. If it doesnt work and it...changes...you, I promise you it will be my hand that strikes you down." she says quietly, her nictitating membranes across her eyes as she soaks the cloth in the weakened poison and dabs it on the tumor. There is a hissing sound as the fluid is absorbed. The vessels across the grwoth's surface take on a black tinge as the blood inside them clots, and Kalissa continues putting the venom on the tissue until the flask is empty.
As everyone does their part, Sssil turns to Urrffrah and sees her talking to the swamp lizar.
"Nihss. Nee-hss. Nnaame, myne." the swamp-lizar says in halting common as he points to his chest. Urrfrrah realizes she probably can't prounounce the last syllable of his name, as it sounds like nothing more than an explosion of air with a hiss after it that one would need a reptilian mouth and forked tongue to make. She sniffs around the area, and has the giant misfortune to inhale a huge flying insect up her nose. Everyone looks up for a second as she sneezes explosively and repeatedly trying to dislodge the tickling thing, spraying barghest snot everwhere.
Have you ever seen a dog *really* *really* sneeze? Yeah...
Finally, the thing is gone, and she can breathe again. "It is time, packmate" Growkgra says to her as he motions toward the now smaller and blackened thing on Thessan's chest.
"Hurry. We are wasting time!" Kalissa murmurs in Zaangaardian.
K, Ameena, you're up. Roll a d20(not attack) and damage.
.
.
So I guess just a distracting sense that there's a connection between the two, but will need Westian or someone to actually say it