In Elden Ring: Nightreign Greatbows are powerful ranged weapons that bolster high damage per shot, but slower pace of firing. They can easily stagger even larger enemies with each shot, which makes them excellent weapon choice for ranged builds that focus on high damage and stagger.
NightreignGreatbows - Nightreign Wiki

Erdtree Greatbow
Greatbow • Lvl Required 7
Weapon Skill: Through And Through
Powerful archery skill using a greatbow held in an oblique stance. Ready the greatbow, then twist the bowstring to fire a mighty greatarrow that can penetrate through enemies.
Greatbow featuring Erdtree styling. In times of old, when faith and battle went hand in hand, this weapon was created in tandem with the Golden Great Arrow. Scales all arrow damage with faith.

Golem Greatbow
Greatbow • Lvl Required 3
Weapon Skill: Through And Through
Powerful archery skill using a greatbow held in an oblique stance. Ready the greatbow, then twist the bowstring to fire a mighty greatarrow that can penetrate through enemies.
Greatbow of black stone crafted by a civilization now gone to ruin. Weapon of the Guardian Golem. Extremely heavy, this greatbow requires enormous strength just to draw, suggesting it was not designed for human use.

Greatbow
Greatbow • Lvl Required 1
Weapon Skill: Through And Through
Powerful archery skill using a greatbow held in an oblique stance. Ready the greatbow, then twist the bowstring to fire a mighty greatarrow that can penetrate through enemies.
Enormous greatbow larger than any man. Can not be drawn with any ordinary level of strength, but the force of its shots is extraordinary. A greatbow can only fire great arrows.

Lion Greatbow
Greatbow • Lvl Required 10
Weapon Skill: Radahn's Rain
Archery skill performed from a low stance. Ready the bow and fire a sudden flurry of arrows up into the sky. The arrows will pour on foes like rain.
Unique Weapon Passive: Power of the General
Greatbow of black iron wielded by General Radahn. Decorated with a lion mane motif. Imbued with gravitational power of the Starscourge, when used along with Radahn's Spear, it becomes a true weapon of a champion.