Lucian, Acadamae Graduate

Whenever Lucian, Acadamae Graduate becomes
tapped, you may exert it.
{t}: Put up to two charge counters on Lucian. Exile
a creature card from your hand with mana value
equal to the number of charge counters on Lucian.
If Lucian is exerted, you may cast the exiled card
without paying its mana cost and it gains haste. Otherwise, you may cast the exiled card without
paying its mana cost at the beginning of your next
upkeep.