Conjuro
Cada oponente exilia cartas de la parte superior de su biblioteca hasta que exilie una carta que no sea tierra. Puedes lanzar cualquier cantidad de hechizos de entre esas cartas que no sean tierra sin pagar sus costes de maná.
Rebote.
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, you must pay those to cast the spell.