Samut, the Driving Force

{3}{R}{G}{W}Legendary Creature — Human Warrior Cleric4/5

First strike, vigilance, haste

Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.)

Other creatures you control get +X/+0, where X is your speed.

Noncreature spells you cast cost {X} less to cast, where X is your speed.

Vigilance. Attacking doesn't cause this creature to tap. · CR 702.20

First strike. This creature deals combat damage before creatures without first strike. · CR 702.7

Haste. This creature can attack and use tap abilities as soon as it comes under your control. · CR 702.10

“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. (2025-02-07)
Each player tracks their speed (or lack thereof) separately. Increasing your speed has no effect on whether another player has speed. (2025-02-07)
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. (2025-02-07)
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. (2025-02-07)
A player “has max speed” if their speed is 4. (2025-02-07)
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. (2025-02-07)