5 files changed, 52 insertions, 19 deletions
diff --git a/engine/card/attack.go b/engine/card/attack.go
index 19ad196..d05d44a 100644
--- a/engine/card/attack.go
+++ b/engine/card/attack.go
@@ -1,11 +1,31 @@
 package card
 
+import (
+	"sakura/engine"
+	"sakura/engine/pool"
+)
+
 type Attack struct {
-	*Card
+	*engine.Card
 
 	MinDistance RangeValue
 	MaxDistance RangeValue
 
-	AuraDamage   DamageValue
-	HealthDamage DamageValue
+	AuraDamage DamageValue
+	LifeDamage DamageValue
+
+	Unreactable bool
+}
+
+func (a *Attack) Attack() *Attack {
+	return a
+}
+
+func (a *Attack) Do(g *engine.Game, to *pool.Pool) {
+}
+
+type IsAttack interface {
+	Attack() *Attack
+	Prepare(g *engine.Game)
+	Do(g *engine.Game, to *pool.Pool)
 }
diff --git a/engine/card/card.go b/engine/card/card.go
deleted file mode 100644
index f2dce83..0000000
--- a/engine/card/card.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package card
-
-type Card struct {
-	Name   string
-	AllOut bool
-	Text   string
-	Flavor string
-}
-
-func (c *Card) Base() *Card {
-	return c
-}
-
-type IsCard interface {
-	Base() *Card
-}
diff --git a/engine/card/damage.go b/engine/card/damage.go
index fccb073..6d7dafd 100644
--- a/engine/card/damage.go
+++ b/engine/card/damage.go
@@ -3,3 +3,7 @@ package card
 type DamageValue int
 
 const Unselectable = DamageValue(-1)
+
+func (d DamageValue) Value() int {
+	return int(d)
+}
diff --git a/engine/card/predicate/predicate.go b/engine/card/predicate/predicate.go
new file mode 100644
index 0000000..5770c3d
--- /dev/null
+++ b/engine/card/predicate/predicate.go
@@ -0,0 +1,18 @@
+package predicate
+
+import (
+	"sakura/engine"
+	"sakura/engine/card"
+)
+
+func Reaction(c engine.IsCard) bool {
+	_, ok := c.(card.IsReaction)
+	return ok
+}
+
+func ReactionApplicable(c engine.IsCard) bool {
+	r, isReaction := c.(card.IsReaction)
+	if isReaction {
+		return r.Applicable(c)
+	}
+}
diff --git a/engine/card/reaction.go b/engine/card/reaction.go
new file mode 100644
index 0000000..3eed8c4
--- /dev/null
+++ b/engine/card/reaction.go
@@ -0,0 +1,7 @@
+package card
+
+import "sakura/engine"
+
+type IsReaction interface {
+	Applicable(c engine.IsCard) bool
+}