Conspiracy

Enchantment, 3BB (5)
As Conspiracy enters the battlefield, choose a creature type.

Creature cards you own that aren't on the battlefield, creature spells you control, and creatures you control are the chosen type.¹
Illus. Jeff Easley

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: It does not replace any use of creature types in card text.
• 10/4/2004: This can grant a creature type to animated lands and artifacts that would otherwise have no creature type.
• 8/1/2005: "Legend" is no longer a creature type, and may not be chosen.
• 8/1/2005: If you choose Wall, then your creatures can still attack because creature types don't confer abilities such as Defender (any more than, say, choosing creature type Bird would confer Flying).

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (2/15)	Time Spiral "Timeshifted" (Special) Mercadian Masques (Rare)