v0.9.1: added a new buff type that stores a counter

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Buff.java

@@ -158,6 +158,12 @@ public class Buff extends Actor {
 		buff.postpone( duration * target.resist(buffClass) );
 		return buff;
 	}
+
+	public static<T extends CounterBuff> T count( Char target, Class<T> buffclass, float count ) {
+		T buff = affect( target, buffclass );
+		buff.countUp( count );
+		return buff;
+	}
 	
 	public static void detach( Char target, Class<? extends Buff> cl ) {
 		for ( Buff b : target.buffs( cl )){

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/CounterBuff.java

@@ -0,0 +1,56 @@
+/*
+ * Pixel Dungeon
+ * Copyright (C) 2012-2015 Oleg Dolya
+ *
+ * Shattered Pixel Dungeon
+ * Copyright (C) 2014-2020 Evan Debenham
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+package com.shatteredpixel.shatteredpixeldungeon.actors.buffs;
+
+import com.watabou.utils.Bundle;
+
+//A buff whose only purposes is to keep track of a count of some form
+public class CounterBuff extends Buff {
+
+	private float count = 0;
+
+	public void countUp( float inc ){
+		count += inc;
+	}
+
+	public void countDown( float inc ){
+		count -= inc;
+	}
+
+	public float count(){
+		return count;
+	}
+
+	private static final String COUNT = "count";
+
+	@Override
+	public void storeInBundle(Bundle bundle) {
+		super.storeInBundle(bundle);
+		bundle.put(COUNT, count);
+	}
+
+	@Override
+	public void restoreFromBundle(Bundle bundle) {
+		super.restoreFromBundle(bundle);
+		count = bundle.getFloat(COUNT);
+	}
+}