diff --git a/core/src/game.rs b/core/src/game.rs
index 64e466e4..5561e50d 100644
--- a/core/src/game.rs
+++ b/core/src/game.rs
@@ -588,7 +588,10 @@ impl Game {
         let casts = match event {
             Event::Damage { construct, colour, amount, mitigation, display: _ } =>
                 self.construct_by_id(*construct).unwrap().damage_trigger_casts(cast, event),
-            // Event::Ko {} => recalculate_stats()
+            Event::Ko { construct } =>{
+                self.construct_by_id(*construct).unwrap().effects.clear();
+                vec![]
+            },
             // Event::Cast {} => set_cooldown()
             _ => vec![],
         };
diff --git a/core/src/skill.rs b/core/src/skill.rs
index a17f62e1..dd3eba6a 100644
--- a/core/src/skill.rs
+++ b/core/src/skill.rs
@@ -751,6 +751,10 @@ impl Cast {
                     colour: Colour::Blue,
                     values: vec![Value::Stat { construct: self.source, stat: Stat::BluePower, mult: self.skill.multiplier() }],
                 },
+                Action::Effect {
+                    construct: self.target,
+                    effect: ConstructEffect { effect: Effect::Siphoned, duration: 1, meta: None }, // immunity to additional ticks
+                },
                 Action::Heal {
                     construct: self.source,
                     colour: Colour::Green,
@@ -768,6 +772,10 @@ impl Cast {
                     colour: Colour::Blue,
                     values: vec![Value::Stat { construct: self.source, stat: Stat::BluePower, mult: self.skill.multiplier() }],
                 },
+                Action::Effect {
+                    construct: self.target,
+                    effect: ConstructEffect { effect: Effect::Siphoned, duration: 1, meta: None }, // immunity to additional ticks
+                },
                 Action::Heal {
                     construct: self.source,
                     colour: Colour::Green,
@@ -785,6 +793,10 @@ impl Cast {
                     colour: Colour::Blue,
                     values: vec![Value::Stat { construct: self.source, stat: Stat::BluePower, mult: self.skill.multiplier() }],
                 },
+                Action::Effect {
+                    construct: self.target,
+                    effect: ConstructEffect { effect: Effect::Siphoned, duration: 1, meta: None }, // immunity to additional ticks
+                },
                 Action::Heal {
                     construct: self.source,
                     colour: Colour::Green,