Spark Extractor

When Spark Extractor enters play, remove a
Loyalty Counter from target Planeswalker, and
put a Spark Counter on Spark Extractor
{3}: Remove a Loyalty Counter from target Planeswalker, and put a Spark Counter on Spark Extractor
{t}, remove a Spark Counter: Add {3}
{t}, remove a Spark Counter: Add 2 mana in any combination of colors
{t}, remove three Spark Counters: Exile target creature