Rising Phyrexian

{b}: If Rising Phyrexian is a Human, it becomes a Phyrexian with base power and toughness 2/2
and infect.
{2}{b}: If Rising Phyrexian is a Phyrexian, it
becomes a Phyrexian Horror with base power
and toughness 4/4 and flying.
{3}{b}{b}: If Rising Phyrexian is a Horror, it
becomes a Phyrexian Horror Praetor with base
power and toughness 6/6 and undying.