We Ride at Dawn — ruling 1

You can tap any untapped creature you control to convoke a spell, even one you haven’t controlled continuously since the beginning of your most recent turn.

We Ride at Dawn — ruling 2

When calculating a spell’s total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn’t change a spell’s mana cost or mana value.

We Ride at Dawn — ruling 3

If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell’s costs. You won’t be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won’t be on the battlefield when you pay the spell’s costs, so you won’t be able to tap it for convoke.

We Ride at Dawn — ruling 4

If you control another player’s commander, you won’t create a Mercenary when you attack with that creature. However, if another player controls your commander, you’ll create a Mercenary when it attacks.

We Ride at Dawn — ruling 5

If you have two commanders and they’re both declared as attackers, We Ride at Dawn’s last ability will trigger twice.

We Ride at Dawn : règles, fonctionnement et interactions (MTG)

We Ride at Dawn is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Legendary creature spells you cast have convoke. (Your creatures can help cast those spells. Each creature you tap while casting a legendary creature spell pays for or one mana of that creature's color.) Whenever your commander attacks, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."

How it works : We Ride at Dawn

Original English text — Wizards of the Coast / Scryfall

#1April 12, 2024· Wizards of the Coast
You can tap any untapped creature you control to convoke a spell, even one you haven’t controlled continuously since the beginning of your most recent turn.
No other card is named in this ruling.
#2April 12, 2024· Wizards of the Coast
When calculating a spell’s total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn’t change a spell’s mana cost or mana value.
No other card is named in this ruling.
#3April 12, 2024· Wizards of the Coast
If a creature you control has a mana ability with in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell’s costs. You won’t be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won’t be on the battlefield when you pay the spell’s costs, so you won’t be able to tap it for convoke.
No other card is named in this ruling.
#4April 12, 2024· Wizards of the Coast
If you control another player’s commander, you won’t create a Mercenary when you attack with that creature. However, if another player controls your commander, you’ll create a Mercenary when it attacks.
Card named in this ruling
Mercenary
#5April 12, 2024· Wizards of the Coast
If you have two commanders and they’re both declared as attackers, We Ride at Dawn’s last ability will trigger twice.
No other card is named in this ruling.