As a reaction, which you use when you are hit by an attack that you can see, you can shrink in size to avoid the attack. Roll a d4 and add the result to your Defense until the start of your next turn, including against the triggering attack. You can do so after the creature rolls but before any effects of the roll occur.
You can then move up to 1.5 meters without provoking opportunity attacks.
You can expend 2 additional mana or psi to roll 2d4.
You can expend 4 additional mana or psi to roll 3d4.
You can expend 1 additional mana or psi to trigger the spell when a creature that you can see within 18 meters is attacked. The attacked creature gains the benefits instead, but cannot move as part of the reaction.