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
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)
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)