Aegis, Sworn Protector

Aegis, Sworn Protector enters the battlefield as
either a 2/2 or a 0/5 with defender
{1}{u}: Gain -2/+3 and defender
{1}{g}: Gain +2/-3 and lose defender
{4}Prevent all damage to Nobles, Fern Permanents,
and gain indestructible until end of turn. This
ability cost {2} more for each time you've activated
it this game