As a move action, a phantom fungus can turn invisible as if using greater invisibility briefly as a semitransparent version of its normal self. This allows any viewer with line of sight to the phantom fungus to pinpoint its location at the time of the attack An opponent can ready an action to strike at the fungus when it momentarily appears, in which case the creature only has concealment instead of invisibility (20% miss chance). The fungus can turn completely visible as a move action, though it normally remains invisible all the time. If killed while invisible, it becomes visible 1d4 minutes later.