Lessandra, Curious Bloodmage

Whenever two or more creature are sacrificed by
the same ability or effect, draw two cards.
Whenever Lessandra, Curious Bloodmage dies,
each player discards a card for each creature that
was sacrificed this turn.
Insidious {1}{b}{b} ({1}{b}{b}, Exile another card with
the same converted mana cost from your graveyard:
You may cast this card from your graveyard until end
of turn.)