add Rakdos Riteknife to incomplete

incomplete/Rakdos_Riteknife.groovy

@@ -0,0 +1,85 @@
+def public MagicPermanentActivation AddBloodCounter(final MagicPermanent source) {
+    return new MagicPermanentActivation(
+        new MagicActivationHints(MagicTiming.Pump),
+        "+Counter"
+    ) {
+
+        @Override
+        public Iterable<MagicEvent> getCostEvent(final MagicPermanent equipped) {
+            return [
+                new MagicTapEvent(equipped),
+                new MagicSacrificePermanentEvent(equipped, SACRIFICE_CREATURE)
+            ];
+        }
+
+        @Override
+        public MagicEvent getPermanentEvent(final MagicPermanent equipped, final MagicPayedCost payedCost) {
+            return new MagicEvent(
+                equipped,
+                source,
+                this,
+                "PN puts a blood counter on RN."
+            );
+        }
+
+        @Override
+        public void executeEvent(final MagicGame game, final MagicEvent event) {
+            game.doAction(new ChangeCountersAction(event.getRefPermanent(), MagicCounterType.Blood, 1));
+        }
+    }
+};
+
+[
+    
+    new MagicStatic(MagicLayer.Ability) {
+        @Override
+        public void modAbilityFlags(final MagicPermanent source, final MagicPermanent permanent, final Set<MagicAbility> flags) {
+            permanent.addAbility(AddBloodCounter(source));
+        }
+        @Override
+        public boolean accept(final MagicGame game,final MagicPermanent source,final MagicPermanent target) { 
+            return MagicStatic.acceptLinked(game,source,target);
+        }
+    },
+    
+    new MagicPermanentActivation(
+        [new MagicArtificialCondition(MagicConditionFactory.CounterAtLeast(MagicCounterType.Blood, 1))],
+        new MagicActivationHints(MagicTiming.Removal),
+        "Sacrifice"
+    ) {
+
+        @Override
+        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
+            return [
+                new MagicSacrificeEvent(source), new MagicPayManaCostEvent(source, "{B}{R}")
+            ];
+        }
+
+        @Override
+        public MagicEvent getPermanentEvent(final MagicPermanent source, final MagicPayedCost payedCost) {
+            return new MagicEvent(
+                source,
+                NEG_TARGET_PLAYER,
+                this,
+                "Target player\$ sacrifices a permanent for each blood counter on SN."
+            );
+        }
+
+        @Override
+        public void executeEvent(final MagicGame game, final MagicEvent event) {
+            event.processTargetPlayer(game, {
+                final int amount = event.getPermanent().getCounters(MagicCounterType.Blood);
+                game.logAppendMessage(event.getPlayer(), "("+amount+")");
+                if (amount > 0) {
+                    for (int i=amount;i>0;i++) {
+                        game.addEvent(new MagicSacrificePermanentEvent(
+                            event.getSource(),
+                            it,
+                            SACRIFICE_PERMANENT
+                        ));
+                    }
+                }
+            });
+        }
+    }
+]