v0.3.0c: refactored staff visual effects to be contained in wands.

src/com/shatteredpixel/shatteredpixeldungeon/items/wands/WandOfFrost.java

@@ -78,6 +78,16 @@ public class WandOfFrost extends Wand {
 		new Slow().proc(staff, attacker, defender, damage);
 	}
 
+	@Override
+	public void staffFx(MagesStaff.StaffParticle particle) {
+		particle.color( 0xFFFFFF );
+		particle.am = 0.5f;
+		particle.setLifespan(1.2f);
+		particle.speed.set(0, Random.Float(5, 8));
+		particle.setSize( 0f, 1f);
+		particle.shuffleXY(2f);
+	}
+
 	@Override
 	public String desc() {
 		return "This wand seems to be made out of some kind of magical ice. It grows brighter towards its " +