Mindless A ripper swarm never has to fall back and is assumed to automatically pass any Morale checks it is required to take, even against attacks which normally force their target to fall back with no test taken. Rippers cannot be pinned. For the purposed of mission objectives, Ripper Swarms cannot capture table quarters, hold objectives, or count as surviving troups in a Meat Grinder battle.
Instinctive Behavior At the start of the Tyranid turn any broods outside Synapse countrol range must take a Morale check for being All On Your Own. If failed consult the Tyranid Instinctive Behavior table. Additionally, roll on this table if a Tyranid creature fails a normal Morale or Pinning test while outside the Synapse control range.