Some cards have triggered abilities with an intervening “if” clause that checks whether you have the city’s blessing. These are worded “[Trigger condition], if you have the city’s blessing, [effect].” You must already have the city’s blessing in order for these abilities to trigger; otherwise they do nothing. In other words, there’s no way to have the ability trigger if you don’t have the city’s blessing, even if you intend to get it in response to the triggered ability.