Which enchantments allow tapping a creature to inflict direct damage?
There are a few Aura cards that grant creatures the ability to tap to deal damage to a target (some with more restrictions than others). To find these cards, I used the magiccards.info search o:"Enchant Creature" o:"Enchanted creature has" o:deal o:"{T}", which finds Auras that enchant creatures that mention dealing damage and have an ability with a tap cost. Those cards are:


Archery Training


  At the beginning of your upkeep, you may put an arrow counter on Archery Training.
  
  Enchanted creature has "{T}: This creature deals X damage to target attacking or blocking creature, where X is the number of arrow counters on Archery Training."

Burning Anger



  Enchanted creature has "{T}: This creature deals damage equal to its power to target creature or player."
  Fire Whip



  Enchant creature you control
  
  Enchanted creature has "{T}: This creature deals 1 damage to target creature or player."
  
  Sacrifice Fire Whip: Fire Whip deals 1 damage to target creature or player.

Hermetic Study



  Enchanted creature has "{T}: This creature deals 1 damage to target creature or player."
  Hypervolt Grasp



  Enchanted creature has "{T}: This creature deals 1 damage to target creature or player."
  
  {1}{U}: Return Hypervolt Grasp to its owner's hand.

Lavamancer&#39;s Skill


  Enchanted creature has "{T}: This creature deals 1 damage to target creature."
  
  As long as enchanted creature is a Wizard, it has "{T}: This creature deals 2 damage to target creature."

Lightning Prowess



  Enchanted creature has haste and "{T}: This creature deals 1 damage to target creature or player."
  Power of Fire



  Enchanted creature has "{T}: This creature deals 1 damage to target creature or player."

Predatory Urge



  Enchanted creature has "{T}: This creature deals damage equal to its power to target creature. That creature deals damage equal to its power to this creature."
  Psionic Gift



  Enchanted creature has "{T}: This creature deals 1 damage to target creature or player."

Quicksilver Dagger



  Enchanted creature has "{T}: This creature deals 1 damage to target player. You draw a card."
  Sinstriker&#39;s Will



  Enchanted creature has "{T}: This creature deals damage equal to its power to target attacking or blocking creature."