Cavalier of Night [The List] Colorless[-20] Set: Modern Horizons 2 Type:

Set: Modern Horizons 2 Type: Creature — Dragon Rarity: Mythic Cost: {5}{U}{U} Delve (Each card you exile from your graveyard while casting this spell pays for {1}

and other players can't gain control of them

exile it instead

Set: Portal Three Kingdoms Type: Instant Rarity: Uncommon Cost: {1}{W} Cast this spell only during the declare attackers step and only if you've been attacked this step

Cavalier of Night [The List] Colorless[-20] Set: Modern Horizons 2 Type:Set: The List Type: Creature Elemental Knight Rarity: Mythic Cost: {2}{B}{B}{B} Lifelink When Cavalier of Night enters the battlefield, you may sacrifice another creature. When you do, destroy target creature an opponent controls. When Cavalier of Night dies, return target creature card with mana value 3 or less from your graveyard to the battlefield.