Onslaught

Enchantment, R (1)
Whenever you cast a creature spell, tap target creature.¹
The last thing to go through the mogg's mind was its teeth.
Illus. Paolo Parente

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Can target an already tapped creature.
• 10/4/2004: The ability is not optional. If you have the only targetable creatures, you have to tap one of your own.
• 4/1/2008: A "creature spell" is any spell with the type Creature, even if it has other types such as Artifact or Enchantment. Older cards of type Summon are also Creature spells.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Exodus (Common)