Quicksilver

{r/w} Quicksilver becomes a Mutant Spirit with base power and toughness 2/2.
{r/w}{r/w}{r/w} If Quicksilver is a Spirit, it becomes a Mutant Spirit Warrior with base power and toughness 4/4
{r/w}{r/w}{r/w}{r/w}{r/w}{r/w} If Quicksilver is a Warrior, it becomes a Mutant Spirit Warrior Avatar with base power and toughness 8/8, flying, and first strike.