As Shapeshifter enters, 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.
Born like a Phoenix from the Flame, But neither Bulk nor Shape the same.n—Jonathan Swift, "Vanbrug's House"
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.
01-08-2008
wotc
The ability that lets you choose a new number is a triggered ability that triggers only once each upkeep.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.