Old man's grave

When Old man's grave comes into play, exile up to
one target card from a graveyard.
{1}, {t}: Exile target card from a graveyard and
create X Treasure tokens, where X is the amount of legendary cards, exiled with Old man's grave.
{1}, {t}, Sacrifice Old man's grave: Draw a card.
"I'll take it with me, into my grave, there it will be
save." "Oh, really?"