simplified and condensed various effects which discard variable amounts of cards

Mage/src/main/java/mage/abilities/effects/common/discard/DiscardAndDrawThatManyEffect.java

@@ -0,0 +1,44 @@
+package mage.abilities.effects.common.discard;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.OneShotEffect;
+import mage.constants.Outcome;
+import mage.game.Game;
+import mage.players.Player;
+import mage.util.CardUtil;
+
+/**
+ * @author TheElk801
+ */
+public class DiscardAndDrawThatManyEffect extends OneShotEffect {
+
+    private final int amount;
+
+    public DiscardAndDrawThatManyEffect(int amount) {
+        super(Outcome.DrawCard);
+        this.amount = amount;
+        staticText = "discard "
+                + (amount == Integer.MAX_VALUE ? "any number of" : "up to" + CardUtil.numberToText(amount))
+                + " cards, then draw that many cards";
+    }
+
+    private DiscardAndDrawThatManyEffect(final DiscardAndDrawThatManyEffect effect) {
+        super(effect);
+        this.amount = effect.amount;
+    }
+
+    @Override
+    public DiscardAndDrawThatManyEffect copy() {
+        return new DiscardAndDrawThatManyEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        player.drawCards(player.discard(0, amount, false, source, game).size(), source, game);
+        return true;
+    }
+}