Cavalier of Night
Creature — Elemental Knight
Lifelink
When this creature enters, you may sacrifice another creature. When you do, destroy target creature an opponent controls.
When this creature dies, return target creature card with mana value 3 or less from your graveyard to the battlefield.
Viktor Titov
The List (PLST)
• #M20-94Rulings
Cavalier of Night’s enters-the-battlefield ability goes on the stack without a target. While that ability is resolving, you may sacrifice another creature. When you do, the reflexive triggered ability triggers and you pick a target creature to be destroyed. This is different from effects that say “If you do . . .” in that players may take actions after you’ve sacrificed the creature but before the target creature is destroyed.
(wotc • 2019-07-12)
If a card in a graveyard has {X} in its mana cost, X is considered to be 0.
(wotc • 2019-07-12)
If a creature card with mana value 3 or less becomes a copy of Cavalier of Night, its last ability can target itself when it dies.
(wotc • 2019-07-12)
While resolving Cavalier of Night’s enters-the-battlefield ability, you can’t sacrifice more than one creature.
(wotc • 2019-07-12)
Rulings
Cavalier of Night’s enters-the-battlefield ability goes on the stack without a target. While that ability is resolving, you may sacrifice another creature. When you do, the reflexive triggered ability triggers and you pick a target creature to be destroyed. This is different from effects that say “If you do . . .” in that players may take actions after you’ve sacrificed the creature but before the target creature is destroyed.
(wotc • 2019-07-12)
If a card in a graveyard has {X} in its mana cost, X is considered to be 0.
(wotc • 2019-07-12)
If a creature card with mana value 3 or less becomes a copy of Cavalier of Night, its last ability can target itself when it dies.
(wotc • 2019-07-12)
While resolving Cavalier of Night’s enters-the-battlefield ability, you can’t sacrifice more than one creature.
(wotc • 2019-07-12)