Artefact
Allumez les moteurs (Si vous n'avez pas de vitesse, elle commence à 1. Elle augmente une fois à chacun de vos tours quand un adversaire perd des points de vie. La vitesse maximale est 4.)
Quand cet artefact arrive, exilez un permanent non-terrain ciblé qu'un adversaire contrôle jusqu'à ce que cet artefact quitte le champ de bataille.
Vitesse maximale —

: Mettez un marqueur +1/+1 sur une cible que vous contrôlez, créature ou véhicule. N'activez que lorsque vous pourriez lancer un rituel.
Each player tracks their speed (or lack thereof) separately. Increasing your speed has no effect on whether another player has speed.
A player “has max speed” if their speed is 4.
If an effect needs to know what a player’s speed is and that player doesn’t have a speed, their speed is considered 0.
Your speed doesn’t change until a spell or ability says so, such as the inherent triggered ability that cares about opponents losing life during your turn. Notably, losing control of permanents with start your engines! doesn’t affect your speed.
“Max speed — [ability]” means “As long as you have max speed, this object has [ability].” If the granted ability functions in a zone other than the battlefield, the max speed ability does too.
Start your engines! isn’t a triggered ability. Increasing your speed to 1 is something that happens as a state-based action as soon as you control a permanent with the ability. Notably, this includes gaining control of a permanent with the ability that another player controls.