Counter text improvements (plus a Magus Lucea Kane gameplay fix) (#11503)

* Improve text generation for some counter abilities

* Magus Lucea Kane must apply to permanent spells (bugfix, related to #11440)

* Further improve text generation of counter text

* Text improvements to a couple cards

* Graft text improvements

* Further remove unused variable

* Be consistent on Backup ability setup, revert Thalia's Lieutenant (filter reuse means it doesn't work)

* Thalia's Lieutenant original text was slightly wrong, fixed

Mage/src/main/java/mage/abilities/keyword/ToxicAbility.java

@@ -28,7 +28,7 @@ public class ToxicAbility extends StaticAbility {
     @Override
     public String getRule() {
         return "toxic " + amount + " <i>(Players dealt combat damage by this creature also get " +
-                CardUtil.numberToText(amount, "a") + " poison counter" + (amount > 1 ? "s" : "") + ".)</i>";
+                CardUtil.getSimpleCountersText(amount, "a", "poison") + ".)</i>";
     }
 
     @Override