We had on previous turns placed characters on our site with the site guard lost soul. On their turn, they played Benedictus? and said that since it negated the lost souls, we couldn't add our character to battle.
We agreed that the placement couldn't be negated but the ability to band in is triggered later so they thought that could be negated like placed enhancements.
If you negate Agur's ability on turns after it is used, it won't affect the placed enhancement, right? I would think these should be the same.