A Geos using HeartColor on Sneff.
HeartColor (心の色 , Kokoro no iro?) is a Black Enemy Tech used by Geos' in Chrono Cross. This tech allows the user to inflict status effects equal to a selected target's innate color. For instance, if the target's innate color is that of green, he/she will be afflicted with both the Poison and Afraid status effects.
The Geos in question will start off by craning its neck back with its arms outstretched. It then places its arms together, causing an ominous orb of rainbow-colored energy to spiral into the heart of the target. This orb will then disappear in black specks of remnant energy.