The opposite of [Gaia's Hand], you know how to construct tinker structures that methodically reduce a planet's capacity to sustain and grow life. Build massive structures that poison a planetary biosphere, or leverage your intuitive socio-biological understanding to gradually undermine the natural selection of a few planet's species in order to introduce fatal flaws in their biological makeup. This would obstruct progressive acclimatization to environmental changes, starting a domino effect that would eventually lead to ecological collapse.