• Shares of Australia's Odyssey Gold fall as much as 21.4% to A$0.022, their lowest level since July 18, 2025

• Stock on track for its biggest intraday pct fall since March 19

• Gold explorer says its toll milling agreement with Gylden Resources has been terminated

• Adds, it remains in discussions with Gylden on a replacement toll milling agreement

• YTD, stock down nearly 40%, including the session's moves

(Reporting by Paridhi Minda in Bengaluru)