Phyrexian Spark Stealer

: Whenever a planeswalker dies Spark Stealer gains X loyalty counters were X = the planeswalker mana value.
0: Create a 0/1 phyrexian creature token with "if you control 3 or more phyrexians this creature gains +1/+0"
-X: destroy target creature or planswalker with mana value of X.