Viala, Lady of Mirrian

If a legendary creature or a creature with
converted mana cost 4 or greater enters the
battlefield put a unification counter on Viala,
Lady of Mirrian then search your library for
a creature card with converted mana cost X
or less where X is the number of unification
counters on Viala, Lady of Mirrian
When a creature dies gain 1 life and scry 1