Tovolar's Packleader (PMID)

Tovolar's Huntmaster

Creature — Human Werewolf

When Tovolar's Huntmaster enters the battlefield, create two 2/2 green Wolf creature tokens.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)

6/6

Tovolar's Packleader

Creature — Werewolf

Whenever Tovolar's Packleader enters the battlefield or attacks, create two 2/2 green Wolf creature tokens.
: Another target Wolf or Werewolf you control fights target creature you don't control.
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)

7/7

"Do you smell that, friends? Fear and despair."
Cristi Balanescu
204s/168
uuid: b4d64e7c-a5a3-5af9-b383-b0251a25042b

Legalities

commander: legal
legacy: legal
modern: legal
pauper: legal
vintage: legal
brawl: legal
pioneer: legal
standard: legal

Rulings

2021-09-24:
Day and night are designations that the game itself can have. The game starts as neither. Once the game becomes day (or less commonly, night), the game will be exactly one of them—day or night—going back and forth for the rest of the game.
2021-09-24:
Before a player untaps their permanents during the untap step, the game checks to see if the day/night designation should change.
2021-09-24:
If it is day, and the active player of the previous turn cast no spells during their turn, it becomes night.
2021-09-24:
If it is night, and the active player of the previous turn cast two or more spells during their turn, it becomes day.
2021-09-24:
For more information about Day and Night and the Daybound and Nightbound abilities, please see the Innistrad: Midnight Hunt Mechanics atricle (https://magic.wizards.com/en/articles/archive/feature/innistrad-midnight-hunt-mechanics-2021-09-02).
2021-09-24:
Double-faced permanents with daybound transform to their nightbound faces as it becomes night. Similarly, double-faced permanents with nightbound transform to their daybound faces as it becomes day. This happens immediately and is not a state-based action. It happens any time it becomes day or night, not just during the untap step.
2021-09-24:
If you cast a spell with daybound during night, that spell will be front face up (that is, daybound face up) on the stack. However, it will enter the battlefield with its back face up (that is, with its nightbound face up). It won't enter with its daybound face up and then transform.
2021-09-24:
If it is night, permanents with daybound that enter the battlefield without being cast will enter with their nightbound faces up.
2021-09-24:
Permanents with daybound and nightbound can't transform via any means other than their daybound and nightbound abilities. Notably, older cards such as Moonmist that instruct a player to transform permanents don't affect permanents with daybound or nightbound.
2021-09-24:
If it's neither day nor night, and a creature with daybound and a creature with nightbound somehow appear on the battlefield at the same time, it becomes day. The creature with nightbound will transform.

Tovolar's Huntmaster // Tovolar's Packleader (PMID)