diff --git a/src/ship/map/enemy.rs b/src/ship/map/enemy.rs
index 6cbe07e..b5efd7c 100644
--- a/src/ship/map/enemy.rs
+++ b/src/ship/map/enemy.rs
@@ -316,6 +316,7 @@ impl MapEnemy {
         }
     }
 
+    #[must_use]
     pub fn set_shiny(self) -> MapEnemy {
         MapEnemy {
             shiny: true,
@@ -337,6 +338,7 @@ impl MapEnemy {
     TODO: distinguish between a `random` rare monster and a `set/guaranteed` rare monster? (does any acceptable quest even have this?)
     guaranteed rare monsters don't count towards the limit
     */
+    #[must_use]
     pub fn set_rare_appearance(self) -> MapEnemy {
         match (self.monster, self.map_area.to_episode()) {
             (MonsterType::RagRappy, Episode::One) => {MapEnemy {monster: MonsterType::AlRappy, shiny:true, ..self}},
@@ -357,6 +359,7 @@ impl MapEnemy {
     }
     
     // in theory this should only be called on monsters we know can have rare types
+    #[must_use]
     pub fn roll_appearance_for_mission(self, rare_monster_table: &RareMonsterAppearTable) -> MapEnemy {
         if rare_monster_table.roll_appearance(&self.monster) {
             return self.set_rare_appearance()