Merlin, Destined Sorcerer

Nobles you control have indestructible.
Whenever you cast your first instant or sorcery
on your turn note it's mana value if it's the first
value noted or the noted value is greater than
the noted value then search your library for
an instant or sorcery card with mana value eaqal
to the noted value plus one and put it into your
hand then shuffle your library.