The Tri-bow is a weapon added by Twilight Forest. It functions similarly to a Bow, except that when fired, it will shoot 3 arrows while consuming 1 Arrow from the player's inventory. The three arrows it shoots are vertically aligned. When using modded or tipped arrows, only one of the arrows shot will hold the effect.
It has a 50% chance to drop when the Snow Queen is slain; otherwise, the Seeker Bow will be dropped.