Cyber Eternity Dragon

While you have a legendary artifact creature in
your graveyard, this card has hexproof and
indestructible.
When this card dies, put another artifact Dragon
from your hand, graveyard, or library onto the
battlefield.
Flashback {c}{c} (You may cast this card from
your graveyard as a sorcery that reads "Target
artifact Dragon you control gains hexproof and
indestructible until your next end step," then
exile it.)