Ballista Watcher
Creature — Human Soldier Werewolf
, 
: This creature deals 1 damage to any target.
Daybound (If a player casts no spells during their own turn, it becomes night next turn.)
"Careful, this thing's dangerous. Wouldn't want anyone getting hurt."
Ballista Wielder
.
Creature — Werewolf: This creature deals 1 damage to any target. A creature dealt damage this way can't block this turn.
Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)
Tomas Duchek
Innistrad: Crimson Vow (VOW)
• #143Rulings
The activated abilities of Ballista Watcher and Ballista Wielder are completely independent of one another. For example, if you activate Ballista Watcher's ability targeting a creature and then it becomes night, the targeted creature can still block this turn. Conversely, if you resolve Ballista Wielder's ability targeting a creature, transforming it into Ballista Watcher won't allow the creature dealt damage this way to block.
(wotc • 2021-11-19)
Rulings
The activated abilities of Ballista Watcher and Ballista Wielder are completely independent of one another. For example, if you activate Ballista Watcher's ability targeting a creature and then it becomes night, the targeted creature can still block this turn. Conversely, if you resolve Ballista Wielder's ability targeting a creature, transforming it into Ballista Watcher won't allow the creature dealt damage this way to block.
(wotc • 2021-11-19)