Tear of Hate
A shard of the shattered Dragon Tear.
The Tear of Hate is a fragment of the Dragon Tear that came about after Lynx switched bodies with Serge. The Acacia Dragoons found it on the ground at Fort Dragonia, and later gave it to Serge. It was eventually combined with the Tear of Love to form the Chrono Cross.
From: Key Items (Chrono Cross)