Desiree, Eager Archivist

Whenever a historic spell is cast, put a
lore counter on Desiree, Eager Archivist
(Artifacts, legendaries and Sagas are historic)
{t}:Cast an instant or sorcery from your graveyard
with a converted mana cost less than the number
of lore counters on this card. After resolving the
chosen spell, exile it.