Maestros Diabolist
Creature — Vampire Warrior
Deathtouch, haste
Whenever this creature attacks, if you don't control a Devil token, create a tapped and attacking 1/1 red Devil creature token with "When this token dies, it deals 1 damage to any target."
Samy Halim
Streets of New Capenna (SNC)
• #383Rulings
Maestros Diabolist's triggered ability has an "intervening 'if'" clause. This means that it checks to see if you control a Devil token both when the ability triggers and when it resolves. Notably, this means that attacking with two Maestros Diabolists will normally cause you to create only one Devil token.
(wotc • 2022-04-29)
Printings
Rulings
Maestros Diabolist's triggered ability has an "intervening 'if'" clause. This means that it checks to see if you control a Devil token both when the ability triggers and when it resolves. Notably, this means that attacking with two Maestros Diabolists will normally cause you to create only one Devil token.
(wotc • 2022-04-29)