Runner's Bane
Enchantment — Aura
Enchant creature with power 3 or less
When Runner's Bane enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Illustrated by
Dragon's Maze#17CommonEnglishLegality
Rulings
Apr 15, 2013
If the enchanted creature’s power increases to 4 or greater, Runner’s Bane will be put into its owner’s graveyard as a state-based action.
Apr 15, 2013
The enchanted creature can still be untapped in other ways, such as by Aurelia, the Warleader.