Cactus Game Design Message Boards

Yes, it's a stalemate.

REG > Ongoing Abilities > Ignore

An ignore ability has four parts:
1. it grants the ignoring card immunity to all cards being ignored
2. it grants the ignored cards immunity to the ignoring card
3. characters not in battle and ignored cannot enter battle (i.e., you cannot choose to bring them into battle and they cannot be targeted by an ability that would bring them into battle)
4. characters already in battle and ignored are treated as though they were not in battle for purposes of determining battle outcome

An ignore ability is ongoing.  Part (1) above targets the cards that gain the ignore status.  Parts (2) and (4) above target the cards that are ignored.  Part (3) above has no target.

[Using Philistine Garrison vs Spiritual Warfare]

Yes. PG is immune to the battle-winning part of the ignore, but the immune part of the ignore will work as well, which will cause a stalemate by mutual immunity.