diff --git a/Mage/src/main/java/mage/actions/MageDrawAction.java b/Mage/src/main/java/mage/actions/MageDrawAction.java
index fb368f55c45..195dac60aaf 100644
--- a/Mage/src/main/java/mage/actions/MageDrawAction.java
+++ b/Mage/src/main/java/mage/actions/MageDrawAction.java
@@ -51,6 +51,7 @@ public class MageDrawAction extends MageAction {
         int numDrawn = 0;
         int score = 0;
         GameEvent event = new DrawCardsEvent(this.player.getId(), source, this.originalDrawEvent, this.amount);
+        // TODO: This needs a better description of how it works. Why "amount < 2"?
         if (amount < 2 || !game.replaceEvent(event)) {
             amount = event.getAmount();
             for (int i = 0; i < amount; i++) {
diff --git a/Mage/src/main/java/mage/players/Player.java b/Mage/src/main/java/mage/players/Player.java
index 82ca682a63f..6f4131fe3c1 100644
--- a/Mage/src/main/java/mage/players/Player.java
+++ b/Mage/src/main/java/mage/players/Player.java
@@ -374,6 +374,7 @@ public interface Player extends MageItem, Copyable<Player> {
 
     /**
      * Draw cards. If you call it in replace events then use method with event.appliedEffects param instead.
+     * Returns 0 if replacement effect triggers on card draw.
      *
      * @param num
      * @param source can be null for game default draws (non effects, example: start of the turn)
@@ -384,6 +385,7 @@ public interface Player extends MageItem, Copyable<Player> {
 
     /**
      * Draw cards with applied effects, for replaceEvent
+     * Returns 0 if replacement effect triggers on card draw.
      *
      * @param num
      * @param source can be null for game default draws (non effects, example: start of the turn)