Ballynock Trapper

{T}: Tap target creature.
Whenever you cast a white spell, you may untap this creature.

Act of Heroism

Untap target creature. It gets +2/+2 until end of turn and can block an additional creature this turn.

Stinging Licid

{1}{U}, {T}: This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay {U} to end this effect.
Whenever enchanted creature becomes tapped, this creature deals 2 damage to that creature's controller.