1 files changed, 18 insertions, 0 deletions
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)
+	}
+}