Emerald Vitae

When Emerald Vitae enters play, choose a
creature card in your hand or graveyard, put
it into play and attach Emerald Vitae to it.
Emerald Vitae becomes an Aura with
'Enchant permanent', 'Enchanted permanent
is an artifact and loses all other types',
'Enchanted permanent is indestructible' and
'If Emerald Vitae leaves play, exile enchanted
permanent'.