Волшебство
Возьмите три карты.
Твердость — Если на разыгрывание этого заклинания было потрачено три или больше синей маны, предскажите 3.
If an effect allows you to cast a spell without paying its mana cost, you can't choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can't waive a cost reduction unless that effect says you may.