Artifact Creature â Construct
When Torrential Gearhulk enters the battlefield, you may cast target instant card from your graveyard without paying its mana cost. If that card would be put into your graveyard this turn, exile it instead.
If you cast the card, you do so as part of the resolution of Torrential Gearhulkâ€™s triggered ability. You canâ€™t wait to cast it later in the turn. Timing restrictions (such as â€œCast [this card] only during combatâ€) still apply.
If you cast a card â€œwithout paying its mana cost,â€ you canâ€™t choose to cast it for any alternative costs, such as emerge costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Incendiary Sabotage, you must pay those to cast the card.
If the card has in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
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