Enchantment — Aura, U (1)
Common
Enchant creature
Enchanted creature can't be blocked unless defending player pays {3} for each creature he or she controls that's blocking it.
"At the core of all power is raw passion." —Gerda Äagesdotter,
Archmage of the Unseen
Illus. Lawrence Snelly

2/1/2007: In the Two-Headed Giant format, you still only have to pay once per creature.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Commander