Refactor - moved OpponentsPoisonCountersCount to shared area

Mage/src/main/java/mage/abilities/dynamicvalue/common/OpponentsPoisonCountersCount.java

@@ -0,0 +1,42 @@
+package mage.abilities.dynamicvalue.common;
+
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.abilities.effects.Effect;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.players.Player;
+
+import java.util.Set;
+import java.util.UUID;
+
+public class OpponentsPoisonCountersCount implements DynamicValue {
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility, Effect effect) {
+        int amount = 0;
+        Set<UUID> playerList = game.getOpponents(sourceAbility.getControllerId());
+        for (UUID playerUUID : playerList) {
+            Player player = game.getPlayer(playerUUID);
+            if (player != null) {
+                amount += player.getCounters().getCount(CounterType.POISON);
+            }
+        }
+        return amount;
+    }
+
+    @Override
+    public DynamicValue copy() {
+        return new OpponentsPoisonCountersCount();
+    }
+
+    @Override
+    public String toString() {
+        return "1";
+    }
+
+    @Override
+    public String getMessage() {
+        return "poison counter your opponents have";
+    }
+}