Suspend is a keyword ability.
Cards with Suspend may be exiled, face up, for its suspend cost, with X time counters on them. During your Upkeep you remove a time counter. When no time counters remain, the spell is cast normally, but without paying its casting cost, if any. If the spell is a Creature it has Haste.
Note: suspending a card is not the same as casting it. The card iscast after the last time counter is removed. Counterspells must be played after the last time counter is removed before it resolves. Triggered abilities that activate when a card is played, or when a card is cast, activate when the last time counter is removed.
- 702.61a Suspend is a keyword that represents three abilities. The first is a static ability that functions while the card with suspend is in a player’s hand. The second and third are triggered abilities that function in the exile zone. “Suspend N—[cost]” means “If you could begin to cast this card by putting it onto the stack from your hand, you may pay [cost] and exile it with N time counters on it. This action doesn’t use the stack,” and “At the beginning of your upkeep, if this card is suspended, remove a time counter from it,” and “When the last time counter is removed from this card, if it’s exiled, play it without paying its mana cost if able. If you can’t, it remains exiled. If you cast a creature spell this way, it gains haste until you lose control of the spell or the permanent it becomes.”
- 702.61b A card is “suspended” if it’s in the exile zone, has suspend, and has a time counter on it.
- 702.61c Casting a spell as an effect of its suspend ability follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.