Epistolary Librarian

智库编修长 (Epistolary Librarian) (zhs)

Creature - Astartes Wizard | Power/Toughness: 3 / 4 (CMC 4)
Veil of Time -- Whenever Epistolary Librarian attacks, you may cast a spell with mana value X or less from your hand without paying its mana cost, where X is the number of attacking creatures.