diff --git a/Mage.Sets/src/mage/cards/s/SentinelsMark.java b/Mage.Sets/src/mage/cards/s/SentinelsMark.java
new file mode 100644
index 0000000000..d22a0487ad
--- /dev/null
+++ b/Mage.Sets/src/mage/cards/s/SentinelsMark.java
@@ -0,0 +1,67 @@
+package mage.cards.s;
+
+import mage.abilities.Ability;
+import mage.abilities.common.EntersBattlefieldTriggeredAbility;
+import mage.abilities.common.SimpleStaticAbility;
+import mage.abilities.condition.common.AddendumCondition;
+import mage.abilities.decorator.ConditionalInterveningIfTriggeredAbility;
+import mage.abilities.effects.common.AttachEffect;
+import mage.abilities.effects.common.continuous.BoostEnchantedEffect;
+import mage.abilities.effects.common.continuous.GainAbilityAttachedEffect;
+import mage.abilities.keyword.EnchantAbility;
+import mage.abilities.keyword.FlashAbility;
+import mage.abilities.keyword.LifelinkAbility;
+import mage.abilities.keyword.VigilanceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.*;
+import mage.target.TargetPermanent;
+import mage.target.common.TargetCreaturePermanent;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class SentinelsMark extends CardImpl {
+
+    public SentinelsMark(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{1}{W}");
+
+        this.subtype.add(SubType.AURA);
+
+        // Flash
+        this.addAbility(FlashAbility.getInstance());
+
+        // Enchant creature
+        TargetPermanent auraTarget = new TargetCreaturePermanent();
+        this.getSpellAbility().addTarget(auraTarget);
+        this.getSpellAbility().addEffect(new AttachEffect(Outcome.BoostCreature));
+        Ability ability = new EnchantAbility(auraTarget.getTargetName());
+        this.addAbility(ability);
+
+        // Enchanted creature gets +1/+2 and has vigilance.
+        ability = new SimpleStaticAbility(new BoostEnchantedEffect(1, 2));
+        ability.addEffect(new GainAbilityAttachedEffect(
+                VigilanceAbility.getInstance(), AttachmentType.AURA
+        ).setText("and has vigilance"));
+        this.addAbility(ability);
+
+        // Addendum — When Sentinel's Mark enters the battlefield, if you cast it during your main phase, enchanted creature gains lifelink until end of turn.
+        this.addAbility(new ConditionalInterveningIfTriggeredAbility(
+                new EntersBattlefieldTriggeredAbility(new GainAbilityAttachedEffect(
+                        LifelinkAbility.getInstance(), AttachmentType.AURA, Duration.EndOfTurn
+                )), AddendumCondition.instance, "<br><i>Addendum</i> &mdash; When {this} enters the battlefield, " +
+                "if you cast it during your main phase, enchanted creature gains lifelink until end of turn."
+        ));
+    }
+
+    private SentinelsMark(final SentinelsMark card) {
+        super(card);
+    }
+
+    @Override
+    public SentinelsMark copy() {
+        return new SentinelsMark(this);
+    }
+}
diff --git a/Mage.Sets/src/mage/sets/RavnicaAllegiance.java b/Mage.Sets/src/mage/sets/RavnicaAllegiance.java
index c830a85c33..662b1c4ee8 100644
--- a/Mage.Sets/src/mage/sets/RavnicaAllegiance.java
+++ b/Mage.Sets/src/mage/sets/RavnicaAllegiance.java
@@ -179,6 +179,7 @@ public final class RavnicaAllegiance extends ExpansionSet {
         cards.add(new SetCardInfo("Scorchmark", 113, Rarity.COMMON, mage.cards.s.Scorchmark.class));
         cards.add(new SetCardInfo("Scrabbling Claws", 238, Rarity.UNCOMMON, mage.cards.s.ScrabblingClaws.class));
         cards.add(new SetCardInfo("Senate Guildmage", 204, Rarity.UNCOMMON, mage.cards.s.SenateGuildmage.class));
+        cards.add(new SetCardInfo("Sentinel's Mark", 20, Rarity.UNCOMMON, mage.cards.s.SentinelsMark.class));
         cards.add(new SetCardInfo("Seraph of the Scales", 205, Rarity.MYTHIC, mage.cards.s.SeraphOfTheScales.class));
         cards.add(new SetCardInfo("Sharktocrab", 206, Rarity.UNCOMMON, mage.cards.s.Sharktocrab.class));
         cards.add(new SetCardInfo("Silhana Wayfinder", 141, Rarity.UNCOMMON, mage.cards.s.SilhanaWayfinder.class));