RHaX, rat-touched

when RHaX, rat-touched enters the battlefield, create a 1/1 green and black Rat creature token
{g}{b}{t}, create a 2/2 green and black X creature token, where X is a Rat, Wolf or Bear. this creature has haste and must attack if possible
{g}{b}, RHaX, rat-touched becomes a 5/5 Rat next to it's other types untill end of turn, activate this ability only when RHaX is attacking or blocking