The idigam can reform its shape in accordance to its needs. Once per turn, as a reflexive action, the idigam may change itself in a significant manner. The possibilities are endless, but include:
• Developing Armor equal to its Rank.
• Growing limbs or means of locomotion that add +10 to its Speed (and possibly allow it to fly, swim, climb, or tunnel with ease).
• Changing appearance to perfectly copy a person or animal.
• Break apart into a swarm, suffering only half damage from most attacks but double damage from area of effect attacks.
• Dissolve into a liquid or gas, allowing it to escape a grapple and move through tiny gaps, grilles and channels.
• Shift dots from one trait to another on a one-for-one basis, up to its Rank in dots per round. It can change Attributes and Influences in this way.
• Exchange one Numen for another.
Some idigam possess limited forms of shifting — some can only turn into water, for example, or can only mimic human beings. Such idigam gain a +5 bonus to dice pools where their new form should benefit them, such as disguise and deception for an idigam mimic attempting to pass as a human.