Added a test and some minor changes.

Mage.Sets/src/mage/cards/s/SepulchralPrimordial.java

@@ -27,10 +27,9 @@
  */
 package mage.cards.s;
 
+import java.util.HashSet;
+import java.util.Set;
 import java.util.UUID;
-import mage.constants.CardType;
-import mage.constants.Outcome;
-import mage.constants.Zone;
 import mage.MageInt;
 import mage.abilities.Ability;
 import mage.abilities.common.EntersBattlefieldTriggeredAbility;
@@ -39,6 +38,9 @@ import mage.abilities.keyword.IntimidateAbility;
 import mage.cards.Card;
 import mage.cards.CardImpl;
 import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.Outcome;
+import mage.constants.Zone;
 import mage.filter.FilterCard;
 import mage.filter.common.FilterCreatureCard;
 import mage.filter.predicate.other.OwnerIdPredicate;
@@ -75,7 +77,7 @@ public class SepulchralPrimordial extends CardImpl {
             for (UUID opponentId : game.getOpponents(ability.getControllerId())) {
                 Player opponent = game.getPlayer(opponentId);
                 if (opponent != null) {
-                    FilterCard filter = new FilterCreatureCard("creature card from " + opponent.getLogName() + "'s graveyard");
+                    FilterCard filter = new FilterCreatureCard("creature card from " + opponent.getName() + "'s graveyard");
                     filter.add(new OwnerIdPredicate(opponentId));
                     TargetCardInOpponentsGraveyard target = new TargetCardInOpponentsGraveyard(0, 1, filter);
                     ability.addTarget(target);
@@ -114,14 +116,18 @@ class SepulchralPrimordialEffect extends OneShotEffect {
     public boolean apply(Game game, Ability source) {
         Player controller = game.getPlayer(source.getControllerId());
         if (controller != null) {
+            Set<Card> cardsToBattlefield = new HashSet<>();
             for (Target target : source.getTargets()) {
                 if (target instanceof TargetCardInOpponentsGraveyard) {
                     Card targetCard = game.getCard(target.getFirstTarget());
                     if (targetCard != null) {
-                        targetCard.putOntoBattlefield(game, Zone.GRAVEYARD, source.getSourceId(), source.getControllerId());
+                        cardsToBattlefield.add(targetCard);
                     }
                 }
             }
+            if (!cardsToBattlefield.isEmpty()) {
+                controller.moveCards(cardsToBattlefield, Zone.BATTLEFIELD, source, game);
+            }
             return true;
         }
         return false;

Mage.Sets/src/mage/cards/t/Trinisphere.java

@@ -91,10 +91,7 @@ class TrinisphereEffect extends CostModificationEffectImpl {
     public boolean applies(Ability abilityToModify, Ability source, Game game) {
         if ((abilityToModify instanceof SpellAbility || abilityToModify instanceof FlashbackAbility)) {
             Permanent permanent = game.getPermanent(source.getSourceId());
-            if(permanent != null && !permanent.isTapped())
+            return permanent != null && !permanent.isTapped();
-            {
-                return true;
-            }
         }
         return false;
     }

Mage.Tests/src/test/java/org/mage/test/cards/cost/modification/CostModificationTest.java

@@ -30,8 +30,9 @@ public class CostModificationTest extends CardTestPlayerBase {
     }
 
     @Test
-    public void testCard1() {
+    public void testCardTrinisphere() {
-        addCard(Zone.BATTLEFIELD, playerA, "Trinisphere");  // Set mana cost to min 3
+        // As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast.
+        addCard(Zone.BATTLEFIELD, playerA, "Trinisphere");
         addCard(Zone.BATTLEFIELD, playerA, "Thalia, Guardian of Thraben"); //+1
         addCard(Zone.BATTLEFIELD, playerA, "Mountain", 3);
         addCard(Zone.HAND, playerA, "Lightning Bolt");
@@ -45,6 +46,27 @@ public class CostModificationTest extends CardTestPlayerBase {
         assertGraveyardCount(playerA, 1);
     }
 
+    // Trinisphere interacts incorrectly with Phyrexian mana. As implemented, Gitaxian Probe gets a required cost of {2}{U/P},
+    // which allows paying 2 life and only 2 mana. This is incorrect: Trinisphere requires that at least 3 mana be paid, and
+    // payment through life doesn't count. (Source: http://blogs.magicjudges.org/rulestips/2012/08/how-trinisphere-works-with-phyrexian-mana/)
+    @Test
+    public void testCardTrinispherePhyrexianMana() {
+        // As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast.
+        addCard(Zone.BATTLEFIELD, playerA, "Trinisphere");
+
+        addCard(Zone.BATTLEFIELD, playerB, "Plains", 2);
+        // Look at target player's hand.
+        // Draw a card.
+        addCard(Zone.HAND, playerB, "Gitaxian Probe"); // Sorcery {UP}
+
+        castSpell(2, PhaseStep.PRECOMBAT_MAIN, playerB, "Gitaxian Probe", playerA);
+        setStopAt(2, PhaseStep.BEGIN_COMBAT);
+        execute();
+
+        assertHandCount(playerB, "Gitaxian Probe", 1);
+        assertGraveyardCount(playerB, "Gitaxian Probe", 0);
+    }
+
     /**
      * Test that cost reduction also works with mana source restriction Myr
      * Superion Spend only mana produced by creatures to cast Myr Superion

Mage/src/main/java/mage/abilities/costs/mana/PhyrexianManaCost.java

@@ -57,7 +57,7 @@ public class PhyrexianManaCost extends ColoredManaCost {
 
     @Override
     public String getText() {
-        return new StringBuilder("{").append(mana.toString()).append("P}").toString();
+        return "{" + mana.toString() + "P}";
     }
 
     @Override