$0.24
Curse of Inertia 
Enchantment — Aura Curse
Commander 2013 Uncommon
Enchant player
Whenever a player attacks enchanted player with one or more creatures, that attacking player may tap or untap target permanent of their choice.
Whenever a player attacks enchanted player with one or more creatures, that attacking player may tap or untap target permanent of their choice.
"As long as I pull the strings, you will dance."—Tezzeret
#36 — Illus. Jasper Sandner