Roiling Horror's power and toughness are each equal to your life total minus the life total of an opponent with the most life.
. X can't be 0. (Rather than cast this card from your hand, you may pay and exile it with X time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)
Whenever a time counter is removed from Roiling Horror while it's exiled, target player loses 1 life and you gain 1 life.
2/1/2007 If your life total is less than or equal to the life total of the opponent with the most life, Roiling Horror’s toughness is 0 or less. It will be put into its owner’s graveyard as a state-based action.
2/1/2007 You never choose an opponent, and the opponent that Roiling Horror looks at is never “locked in.” Roiling Horror continuously looks at the life totals of all opponents and uses whichever value is the largest.
2/1/2007 Both instances of X in the suspend ability are the same. You determine the value of X as you suspend the card from your hand. The value you choose must be at least 1.
2/1/2007 If this is suspended, then when the last time counter is removed from it, both its triggered ability and the “play this card” part of the suspend ability will trigger. They can be put on the stack in either order.
6/7/2013 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 (such as flash) and any other effects that could stop you from casting it (such as Meddling Mage’s effect) 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.
6/7/2013 Exiling a card with suspend isn’t casting that card. This action doesn’t use the stack and can’t be responded to.
6/7/2013 If the spell requires any targets, those targets are chosen when the spell is finally cast, not when it’s exiled.
6/7/2013 If the first triggered ability of suspend (the one that removes time counters) is countered, no time counter is removed. The ability will trigger again during the card’s owner’s next upkeep.
6/7/2013 When the last time counter is removed, the second triggered ability of suspend will trigger. It doesn’t matter why the last time counter was removed or what effect removed it.
6/7/2013 If the second triggered ability of suspend (the one that lets you cast the card) is countered, the card can’t be cast. It remains exiled with no time counters on it, and it’s no longer suspended.
6/7/2013 As the second triggered ability resolves, you must cast the card if able. Timing restrictions based on the card’s type are ignored.
6/7/2013 If you can’t cast the card, perhaps because there are no legal targets available, it remains exiled with no time counters on it, and it’s no longer suspended.
6/7/2013 If the spell has any mandatory additional costs, you must pay those if able. However, if an additional cost includes a mana payment, you are forced to pay that cost only if there’s enough mana in your mana pool at the time you cast the spell. You aren’t forced to activate any mana abilities, although you may do so if you wish.
6/7/2013 A creature cast using suspend will enter the battlefield with haste. It will have haste until another player gains control of it (or, in some rare cases, gains control of the creature spell itself).