Add guards and implement basic cards

Assets/Battle/CardsHeroes/LeadShotHCard.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class LeadShotHCard : HeroCard
+{
+    public LeadShotHCard(BattleParticipant owner)
+        : base(owner, HCardId.LeadShot, "Lead Shot", 1, CardType.Attack,
+            "Deals 2 damage to another target.") {
+    }
+
+    public override IEnumerator Use(IBattleEffectApplier effectApplier,
+            MonsterViewpoint viewpoint, BattlePlayerControls playerControls) {
+        SingleTargeting singleTargeting = new SingleTargeting(new OtherTargetPolicy(this.owner));
+        yield return playerControls.StartCoroutine(playerControls.ChooseTarget(singleTargeting));
+        yield return new WaitForSeconds(0.8f);
+        BattleParticipant target = singleTargeting.GetTarget();
+        effectApplier.Apply(new DealDamageEffect(target, 2));
+        yield return new WaitForSeconds(0.8f);
+    }
+}

Assets/Battle/CardsHeroes/LeadShotHCard.cs.meta

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Assets/Battle/CardsHeroes/ShieldBlockHCard.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class ShieldBlockHCard : HeroCard
+{
+    public ShieldBlockHCard(BattleParticipant owner)
+        : base(owner, HCardId.ShieldBlock, "Shield Block", 1, CardType.Skill,
+            "Block 2 damage on target ally.") {
+
+    }
+
+    public override IEnumerator Use(IBattleEffectApplier effectApplier,
+            MonsterViewpoint viewpoint, BattlePlayerControls playerControls) {
+        SingleTargeting singleTargeting = new SingleTargeting(new AnyHeroTargetPolicy());
+        yield return playerControls.StartCoroutine(playerControls.ChooseTarget(singleTargeting));
+        yield return new WaitForSeconds(0.8f);
+        BattleParticipant target = singleTargeting.GetTarget();
+        effectApplier.Apply(new BlockEffect(target, 2));
+        yield return new WaitForSeconds(0.8f);
+    }
+}

Assets/Battle/CardsHeroes/ShieldBlockHCard.cs.meta

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Assets/Battle/CardsHeroes/SmokeBombHCard.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class SmokeBombHCard : HeroCard
+{
+    public SmokeBombHCard(BattleParticipant owner)
+        : base(owner, HCardId.SmokeBomb, "Smoke Bomb", 2, CardType.Skill,
+            "Blocks 2 damage on all allies.") {
+
+    }
+
+    public override IEnumerator Use(IBattleEffectApplier effectApplier,
+            MonsterViewpoint viewpoint, BattlePlayerControls playerControls) {
+        yield return new WaitForSeconds(0.8f);
+        effectApplier.Apply(new MassBlockEffect(TeamChoice.Heroes, 2));
+        yield return new WaitForSeconds(0.8f);
+    }
+}

Assets/Battle/CardsHeroes/SmokeBombHCard.cs.meta

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Assets/Battle/CardsHeroes/SwordSlashHCard.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class SwordSlashHCard : HeroCard
+{
+    public SwordSlashHCard(BattleParticipant owner)
+        : base(owner, HCardId.SwordSlash, "Sword Slash", 1, CardType.Attack,
+            "Deals 1 damage to target.") {
+    }
+
+    public override IEnumerator Use(IBattleEffectApplier effectApplier,
+            MonsterViewpoint viewpoint, BattlePlayerControls playerControls) {
+        SingleTargeting singleTargeting = new SingleTargeting(new AnyTargetPolicy());
+        yield return playerControls.StartCoroutine(playerControls.ChooseTarget(singleTargeting));
+        yield return new WaitForSeconds(0.8f);
+        BattleParticipant target = singleTargeting.GetTarget();
+        effectApplier.Apply(new DealDamageEffect(target, 1));
+        yield return new WaitForSeconds(0.8f);
+    }
+}

Assets/Battle/CardsHeroes/SwordSlashHCard.cs.meta

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