From c3b655f6758b1e590a575c4a19ef4377698932e5 Mon Sep 17 00:00:00 2001
From: Agetian <stavdev@mail.ru>
Date: Tue, 6 Feb 2018 22:17:48 +0300
Subject: [PATCH] - Do not allow the human to confirm a Reveal cost with 0
 revealed cards if the minimum is more than zero (fixes e.g. Morph costs with
 "Reveal a X card" when the human player doesn't have that kind of card in
 hand).

---
 forge-gui/src/main/java/forge/player/HumanCostDecision.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/forge-gui/src/main/java/forge/player/HumanCostDecision.java b/forge-gui/src/main/java/forge/player/HumanCostDecision.java
index e445ddf5d4e..2621cea7ac2 100644
--- a/forge-gui/src/main/java/forge/player/HumanCostDecision.java
+++ b/forge-gui/src/main/java/forge/player/HumanCostDecision.java
@@ -855,6 +855,9 @@ public class HumanCostDecision extends CostDecisionMakerBase {
                     num = AbilityUtils.calculateAmount(source, amount, ability);
                 }
             }
+            if (hand.size() < num) {
+                return null;
+            }
             if (num == 0) {
                 return PaymentDecision.number(0);
             };