It could change the form and state of the iro silk to whatever it wanted, and most times, it chose to make them in the form of spears similar to icicles.
All in all, it could create any size or form it desired with the iro silk, and the iro silk was tough enough to withstand almost anything.
The temperature of the river of flames wasn't high enough to melt it, even though it was hot enough to incinerate a full-grown adult human before they made contact with its surface.
Mixedbloods around Gustav level have tougher bodies, so they could last for about three to five seconds before they were incinerated completely within.
Gustav had a high defense level, so he could last for way longer, but he also would eventually be consumed completely within.
Gustav never used the power of the Kilapisole in public view because he had to partially or totally transform into the creature before he could materialize iro silk.
