Note: This is a battle to the death/escape, not a WDYLM, and my vote does not count.
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Current Yangchuanosaurus kills (ranked by difficulty to kill)
LOW EFFORT
Concavenator, Skorpiovenator
HIGH EFFORT
Ceratosaurus,Datanglong, Streptospondylus, Vallibonavenatrix, Lourinhanosaurus,
EXTREME STRUGGLE
Qianzhousaurus, Yutyrannus