You can treat this like an anthem effect,but it does impact spells
When combined with other spot removal or sweepers they can be the optimal form of removal or, when facing a full board state, they can be awkward and ineffective
This is likely due to its first appearance being in Portal Three Kingdoms, well before white became the de facto color when it comes to small creature synergies
1 Bower Passage
2023-06-16 The trigger event doesn't have to specifically refer to legendary permanents or to artifacts, nor does it have to specifically refer to when something "leaves the battlefield." For example, an ability that triggers "whenever a creature dies" would trigger twice if a legendary creature or an artifact creature dies while Gandalf the White is on the battlefield, as would an ability that triggers "whenever a permanent is put into a graveyard from the battlefield." 2023-06-16 Look at each legendary permanent and each artifact as it exists on the battlefield, taking into account continuous effects, to determine whether any triggered abilities will trigger multiple times
Rabid FF fans are going to want more of this