原文If the first instant or sorcery spell you cast in a turn doesn’t cost any , its cost will be reduced by for each land you control with a flood counter on it.
原文In the case where the first instant or sorcery spell you cast in a turn does cost some but you control more lands with flood counters on them than the number of in that spell’s mana cost, all of the in the cost are reduced first before moving on to the generic mana. For example, if you control four lands with flood counters on them and you cast Season of Weaving (a sorcery with mana cost ) as the first instant or sorcery spell of your turn, its cost will be reduced by , meaning its total cost will be .
原文To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of this ability). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.