- last post: 01.01.0001 12:00 AM PDT
Posted by: SatanInASweater
Posted by: ajhayter
Quite simple really.
Flood need sentient life for "Food". The Index is needed to activate Halo, thereby killing all sentient life (Flood Food). The Flood want more Food, and so don't want Halo activated, so they try to stop you getting the index to activate it.
343 Guilty Spark said that the Flood's parasitic nature denies them intelligence, so they can't know that the Index will kill all sentient life.
a gravemind could