Shapeshifter

{6} · Artifact Creature — Shapeshifter

As this creature 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.

Motor: se resuelve a mano

Rulings (2)

The ability that lets you choose a new number is a triggered ability that triggers only once each upkeep.
Wizards of the Coast · 2008-08-01
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.
Wizards of the Coast · 2008-08-01