Shapeshifter

Artifact Creature - Shapeshifter X/7-X, 6 (6)
As Shapeshifter enters the battlefield, choose a number between 0 and 7.
At the beginning of your upkeep, you may choose a number between 0 and 7.
Shapeshifter's power is equal to the last chosen number and its toughness is equal to 7 minus that number.¹
Illus. Dan Frazier

Gatherer Card Rulings [Nov 2009]

• 8/1/2008: The ability that sets its power and toughness is a characteristic-defining ability. This means it applies before any other effects that modify power and/or toughness.
• 8/1/2008: The ability that lets you choose a new number is a triggered ability that triggers only once each upkeep.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (3/18)	Fifth Edition (Uncommon) Fourth Edition (Uncommon) Antiquities (Rare)