Kha'zix, Voidreaver

{3}: If Kha'zix is an Insect, it becomes a 4/4 Voidling Assassin and gains first strike and "When this creature attacks it gains flying until end of turn"

{3}: If Kha'zix is an Assassin, it becomes a 6/6 Voidling Avatar and gains hexproof and
"If Kha'zix becomes blocked by exactly one creature, double Kha'zix's power until end of turn"