Energy Whip

Enchant creature or planeswalker
Enchanted creature gets +1/+0 and has reach.
When Energy Whip becomes attached to a planeswalker, you may add 1 loyalty counter to enchanted planeswalker.
Whenever enchanted creature attacks, or you
activate loyalty ability of enchanted planeswalker,
you may tap target creature an opponent controls. Energy Whip deals 1 damage to that creature.
Sorcerer Supreme —If you control a Stephen planeswalker, you may cast this spell for {2}.