Surge of Acclaim

Jump-start appears on some instants and sorceries. It represents two static abilities: one that functions while the card is in a player’s graveyard and another that functions while the card is on the stack. “Jump-start” means “You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by discarding a card as an additional cost to cast it” and “If this spell was cast using its jump-start ability, exile this card instead of putting it anywhere else any time it would leave the stack.” Casting a spell using its jump-start ability follows the rules for paying additional costs in rules 601.2b and 601.2f–h.

Start your engines! is a static ability. If a player controls a permanent with start your engines! and that player has no speed, their speed becomes 1. This is a state-based action. See rule 704.

Players do not have speed until a rule or effect sets their speed to a specific value.

If a player has no speed and they are instructed to increase their speed by a certain value, their speed becomes that value.

There is an inherent triggered ability associated with a player having 1 or more speed. This ability has no source and is controlled by that player. That ability is “Whenever one or more opponents lose life during your turn, if your speed is less than 4, your speed increases by 1. This ability triggers only once each turn.”

Rules and effects may refer to whether a player has “max speed.” A player has max speed if their speed is 4.

Some effects refer to a player’s speed. If that player has no speed, their speed is 0 for the purpose of an effect that refers to speed.