Scholar of the Lost Trove
Creature — Sphinx
Flying
When this creature enters, you may cast target instant, sorcery, or artifact card from your graveyard without paying its mana cost. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead.
Volkan Baǵa
Jumpstart (JMP)
• #14Rulings
If a spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
(wotc • 2020-06-23)
If you wish to cast the target card, you must cast it while the triggered ability is resolving. You can’t cast it later in the turn.
(wotc • 2020-06-23)
If you cast an artifact spell this way, it won’t be exiled if it would be put into your graveyard this turn.
(wotc • 2020-06-23)
If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, those must be paid to cast the spell.
(wotc • 2020-06-23)
Rulings
If a spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
(wotc • 2020-06-23)
If you wish to cast the target card, you must cast it while the triggered ability is resolving. You can’t cast it later in the turn.
(wotc • 2020-06-23)
If you cast an artifact spell this way, it won’t be exiled if it would be put into your graveyard this turn.
(wotc • 2020-06-23)
If you cast a spell “without paying its mana cost,” you can’t choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, those must be paid to cast the spell.
(wotc • 2020-06-23)