Planeswalker's Spark

A creature you control becomes a Planeswalker in addition to its other types. Keeps all its effects.
Loyalty equal to Half of the Average of its power
and toughness rounded up. Gains:
+1-Put a +1/+1 counter on this creature
-5-This creature fights target creature
-10-This creature gains First Strike, Double strike, Indestructible, Deathtouch, Lifelink, vigilance
When this enchantment is destroyed, remove all
+1/+1 counters and abilities that were added to
this creature