keya, montain-bird bringer

whenever you cast on instant or sorcery spell,
create a 2/2 bird creature token with flying.
whenever you copy an instant or sorcery spell,
you may counter it. if you do, create a 2/2 bird creature token with flying.
if a creature you control would die, you may exile
it instead. if you do, create a 2/2 bird creature with flying.