diff --git a/core/src/game.rs b/core/src/game.rs
index 1ec23c5a..b55a3f57 100644
--- a/core/src/game.rs
+++ b/core/src/game.rs
@@ -166,7 +166,7 @@ impl Game {
 
     fn skill_phase_start(mut self, resolution_animation_ms: i64) -> Game {
         if ![Phase::Start, Phase::Resolve].contains(&self.phase) {
-            panic!("game not in Resolve or start phase");
+            panic!("game not in Resolve or start phase {:?}", self.phase);
         }
         self.phase = Phase::Skill;
 
@@ -428,7 +428,8 @@ impl Game {
                         .cloned()
                         .filter_map(|e| e.meta)
                         .filter_map(move |m| match m {
-                            EffectMeta::CastTick { source, target, skill, speed, amount } => Some(Cast::new(source, c.account, target, skill)),
+                            EffectMeta::CastTick { source, target, skill, speed, amount: _ } =>
+                                Some(Cast::new(source, c.account, target, skill).set_speed(speed)),
                             _ => None,
                         })
                 )
@@ -854,6 +855,7 @@ pub enum Action {
 #[derive(Debug,Clone,PartialEq,Serialize,Deserialize)]
 pub struct Resolution {
     pub skill: Skill,
+    pub speed: usize,
     pub focus: Vec<Uuid>,
     pub event: Event,
     pub delay: i64,
@@ -870,6 +872,7 @@ impl Resolution {
 
         Resolution {
             skill: cast.skill,
+            speed: cast.speed,
             delay: 0, // set at the end of the resolve phase because of changes depending on what's before/after
             focus,
             event,
@@ -1789,7 +1792,6 @@ mod tests {
             _ => false,
         }));
 
-        println!("{:#?}", resolutions);
         assert!(resolutions.iter().any(|r| match r.event {
             Event::Damage { construct, colour, amount, mitigation: _, display: _ } =>
                 construct == target && amount > 0 && colour == Colour::Blue,
@@ -1969,35 +1971,42 @@ mod tests {
     }
 
     #[test]
-    fn tick_speed_tests() {
-        let mut game = create_2v2_test_game();
+    fn tick_consistency_test() {
+        let mut game = create_test_game();
         let player_id = game.players[0].id;
         let source = game.players[0].constructs[0].id;
         let target = game.players[1].constructs[0].id;
 
-        game.new_resolve(Cast::new(source, player_id, target, Skill::Decay));
         game.new_resolve(Cast::new(source, player_id, target, Skill::Siphon));
 
-        game = game.resolve_phase_start();
-
         let last = game.resolutions.len() - 1;
         let resolutions = &game.resolutions[last];
-        assert!(Skill::DecayTick == resolutions[0].skill);
 
-        // Check speed ticks are static after they're cast
-        game = create_2v2_test_game();
-        let player_id = game.players[0].id;
-        let source = game.players[0].constructs[0].id;
-        let target = game.players[1].constructs[0].id;
+        let (siphon_speed, siphon_dmg) = resolutions.iter()
+            .filter(|r| r.skill == Skill::Siphon)
+            .find_map(|r| match r.event {
+                Event::Damage { construct: _, colour: _, amount, mitigation, display: _ } => Some((r.speed, amount + mitigation)),
+                _ => None,
+            })
+            .unwrap();
+
+        game.progress_durations(); // pretend it's a new turn
 
-        game.new_resolve(Cast::new(source, player_id, target, Skill::Decay));
         game.new_resolve(Cast::new(source, player_id, source, Skill::HastePlusPlus));
-        game.new_resolve(Cast::new(source, player_id, target, Skill::Siphon));
-
         game = game.resolve_phase_start();
 
         let last = game.resolutions.len() - 1;
         let resolutions = &game.resolutions[last];
-        assert!(Skill::SiphonTick == resolutions[0].skill);
+
+        let (siphon_tick_speed, siphon_tick_dmg) = resolutions.iter()
+            .filter(|r| r.skill == Skill::SiphonTick)
+            .find_map(|r| match r.event {
+                Event::Damage { construct: _, colour: _, amount, mitigation, display: _ } => Some((r.speed, amount + mitigation)),
+                _ => None,
+            })
+            .unwrap();
+
+        assert_eq!(siphon_tick_dmg, siphon_dmg);
+        assert_eq!(siphon_tick_speed, siphon_speed);
     }
 }
diff --git a/core/src/skill.rs b/core/src/skill.rs
index f01f6020..ce10a3f8 100644
--- a/core/src/skill.rs
+++ b/core/src/skill.rs
@@ -36,14 +36,10 @@ impl Cast {
         self.target
     }
 
-    pub fn new_tick(source: &mut Construct, target: &mut Construct, skill: Skill) -> Cast {
+    pub fn set_speed(self, speed: usize) -> Cast {
         Cast {
-            id: Uuid::new_v4(),
-            source: source.id,
-            player: source.account,
-            target: target.id,
-            skill,
-            speed: source.skill_speed(skill),
+            speed,
+            ..self
         }
     }
 
@@ -1944,6 +1940,7 @@ fn ruin(cast: Cast, game: &mut Game) {
     );
 }
 
+
 fn siphon(cast: Cast, game: &mut Game) {
     let amount =
         game.value(Value::Stat { construct: cast.source, stat: Stat::BluePower }).pct(cast.skill.multiplier())