壞滅足跡

Text:

延緩4～（除了從你手上施放此牌，你能支付並將它放逐，且上面有四個計時指示物。在你的維持開始時，從其上移去一個計時指示物。當移去最後一個時，則施放它且不需支付其魔法力費用。）
派出兩個4/4綠色，具踐踏異能的犀牛衍生生物。

Rulings:

• 6/14/2019 Crashing Footfalls has no mana cost. You can’t cast it unless an effect (such as that of suspend) allows you to cast it for an alternative cost or without paying its mana cost. Its converted mana cost is 0.
• 6/14/2019 You can exile a card in your hand using suspend any time you could cast that card. Consider its card type, any effect that affects when you could cast it, and any other effects that could stop you from casting it to determine if and when you can do this. Whether or not you could actually complete all steps in casting the card is irrelevant. For example, you can exile a card with suspend that has no mana cost or requires a target even if no legal targets are available at that time.
• 6/14/2019 Exiling a card with suspend isn’t casting that card. This action doesn’t use the stack and can’t be responded to.
• 6/14/2019 After removing the last time counter, you must cast the card if able. Timing permissions based on the card’s type are ignored. If an effect prohibits you from casting the card, it remains exiled with no time counters on it, and it’s no longer suspended.