diff --git a/Mage.Sets/src/mage/cards/m/MarshlandBloodcaster.java b/Mage.Sets/src/mage/cards/m/MarshlandBloodcaster.java
new file mode 100644
index 00000000000..cb196f280b3
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/m/MarshlandBloodcaster.java
@@ -0,0 +1,119 @@
+package mage.cards.m;
+
+import mage.MageInt;
+import mage.abilities.Ability;
+import mage.abilities.common.SimpleActivatedAbility;
+import mage.abilities.condition.common.SourceIsSpellCondition;
+import mage.abilities.costs.AlternativeCostSourceAbility;
+import mage.abilities.costs.Cost;
+import mage.abilities.costs.DynamicCost;
+import mage.abilities.costs.common.PayLifeCost;
+import mage.abilities.costs.common.TapSourceCost;
+import mage.abilities.costs.mana.ManaCostsImpl;
+import mage.abilities.effects.ContinuousEffectImpl;
+import mage.abilities.keyword.FlyingAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.filter.FilterCard;
+import mage.game.Game;
+import mage.players.Player;
+import mage.watchers.common.SpellsCastWatcher;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class MarshlandBloodcaster extends CardImpl {
+
+    public MarshlandBloodcaster(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{4}{B}");
+
+        this.subtype.add(SubType.VAMPIRE);
+        this.subtype.add(SubType.WARLOCK);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(5);
+
+        // Flying
+        this.addAbility(FlyingAbility.getInstance());
+
+        // {1}{B}, {T}: Rather than pay the mana cost of the next spell you cast this turn, you may pay life equal to that spell's mana value.
+        Ability ability = new SimpleActivatedAbility(new MarshlandBloodcasterEffect(), new ManaCostsImpl<>("{1}{B}"));
+        ability.addCost(new TapSourceCost());
+        this.addAbility(ability, new SpellsCastWatcher());
+    }
+
+    private MarshlandBloodcaster(final MarshlandBloodcaster card) {
+        super(card);
+    }
+
+    @Override
+    public MarshlandBloodcaster copy() {
+        return new MarshlandBloodcaster(this);
+    }
+}
+
+class MarshlandBloodcasterEffect extends ContinuousEffectImpl {
+
+    private static final FilterCard filter = new FilterCard("a spell");
+    private final AlternativeCostSourceAbility alternativeCastingCostAbility = new AlternativeCostSourceAbility(
+            SourceIsSpellCondition.instance, null, filter, true, MarshlandBloodcasterCost.instance
+    );
+    private int spellsCast = -1;
+
+    public MarshlandBloodcasterEffect() {
+        super(Duration.EndOfTurn, Layer.RulesEffects, SubLayer.NA, Outcome.Detriment);
+        staticText = "rather than pay the mana cost of the next spell you cast this turn, " +
+                "you may pay life equal to that spell's mana value";
+    }
+
+    public MarshlandBloodcasterEffect(final MarshlandBloodcasterEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public MarshlandBloodcasterEffect copy() {
+        return new MarshlandBloodcasterEffect(this);
+    }
+
+    @Override
+    public void init(Ability source, Game game, UUID activePlayerId) {
+        super.init(source, game, activePlayerId);
+        alternativeCastingCostAbility.setSourceId(source.getSourceId());
+        spellsCast = getSpellsCast(source.getControllerId(), game);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        if (getSpellsCast(source.getControllerId(), game) > spellsCast) {
+            return false;
+        }
+        Player controller = game.getPlayer(source.getControllerId());
+        if (controller == null) {
+            return false;
+        }
+        controller.getAlternativeSourceCosts().add(alternativeCastingCostAbility);
+        return true;
+    }
+
+    private static int getSpellsCast(UUID playerId, Game game) {
+        SpellsCastWatcher watcher = game.getState().getWatcher(SpellsCastWatcher.class);
+        return watcher != null ? watcher.getSpellsCastThisTurn(playerId).size() : 0;
+    }
+}
+
+enum MarshlandBloodcasterCost implements DynamicCost {
+    instance;
+
+    @Override
+    public Cost getCost(Ability ability, Game game) {
+        return new PayLifeCost(ability.getManaCosts().manaValue());
+    }
+
+    @Override
+    public String getText(Ability ability, Game game) {
+        return "Pay " + ability.getManaCosts().manaValue() + " life rather than "
+                + ability.getManaCosts().getText() + '?';
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/Commander2021Edition.java b/Mage.Sets/src/mage/sets/Commander2021Edition.java
index d4913f3b4ef..8f962cf165a 100644
--- a/Mage.Sets/src/mage/sets/Commander2021Edition.java
+++ b/Mage.Sets/src/mage/sets/Commander2021Edition.java
@@ -186,6 +186,7 @@ public final class Commander2021Edition extends ExpansionSet {
         cards.add(new SetCardInfo("Magister of Worth", 223, Rarity.RARE, mage.cards.m.MagisterOfWorth.class));
         cards.add(new SetCardInfo("Mana Geyser", 176, Rarity.COMMON, mage.cards.m.ManaGeyser.class));
         cards.add(new SetCardInfo("Managorger Hydra", 199, Rarity.RARE, mage.cards.m.ManagorgerHydra.class));
+        cards.add(new SetCardInfo("Marshland Bloodcaster", 43, Rarity.RARE, mage.cards.m.MarshlandBloodcaster.class));
         cards.add(new SetCardInfo("Martial Impetus", 96, Rarity.UNCOMMON, mage.cards.m.MartialImpetus.class));
         cards.add(new SetCardInfo("Master Biomancer", 224, Rarity.MYTHIC, mage.cards.m.MasterBiomancer.class));
         cards.add(new SetCardInfo("Memorial to Genius", 301, Rarity.UNCOMMON, mage.cards.m.MemorialToGenius.class));