Legend of the Five Rings: Echoes
Frozen Heart (Broken)
Katana of ice
Frozen Heart (as the blade was once known long ago) is a nemuranai katana that appears to be made completely of ice. As a nemuranai it ignores all invulnerability.
The bearer is also immune to natural cold. He also gains reduction 10 against any cold-based mystical attacks.
This nemuranai was gifted to Kitsune Toshiro when his own blade snapped while he and the Echoes were helping rid a Yuki-Onna of a small group of Gaki that had trapped her physical form and were feeding from it. The blade is solid ice, though magical in nature, and thus does not melt.