Isa is a rune associated with ice and winter itself, representing the icicle that will turn to water. Isa represents a forced stillness, a period of rest before activity, as in winter, there is nothing to do but wait for the ice to transform into water again. Therefore, Isa is the essence of Stillness, signifying a delay that may lead to a new start, or a call for inward focus (introspection) in contemplation and preparation. Another aspect of Isa which is also evoked by its nature as ice is that Isa can represent containment, as ice still holds the kinetic energy/movement of water within itself – as Isa only appears to be still. Related to this, Isa can be the layer of shimmering ice on the surface of a frozen lake that gives the illusion of stability and safety that only becomes treacherous if one should tread upon it without forethought and wisdom.
As the final rune in Loki’s name, I believe that Isa represents the ice at the advent of creation, as Isa evokes His primordial nature as a Jotun, as Beings of transformative energy and the unity of opposites in nature.
As well, Loki is a master of illusion, much like that frozen layer of ice on the surface of the lake; approaching Loki without wisdom and forethought can be treacherous.
In conclusion, one may see in the runes of Loki’s name, there are the forces that oppose (fire and ice) that are the essence of creation.
As an agent of change and transformation, perhaps these are the forces that Loki represents at Ragnarok: the chaos that brings balance, and the overwhelming change that damages then heals.
As well, during the Lokasenna, perhaps Loki serves as the illumination of sudden insight (Kenaz) and the warning (Kaunen) – the mark of the wound that exists to highlight the sickness and disorder – that needs to be dealt with in order to heal and progress
Three runes -Laguz, Kenaz, and Isa – represent the duality of the shapeshifting transformative forces of His energy and His nature – and perhaps these energies combine to strengthen, expose, and temper the concurrent forces of overwhelm, incineration, and damage that echo through Othala as the rune of ancestral knowledge and memory.
Hail Loki indeed ❤