Vampire Frog Staff

The Vampire Frog Staff is a summon weapon. It has a 4.17% chance to be dropped by a Zombie Merman and a 2.22% chance to be dropped by a Wandering Eye Fish, both of which spawn while fishing during a Blood Moon. It spawns a vampire frog that follows the player and attacks by jumping towards enemies and sticking their tongue out in a melee attack. Like other minions, summoned vampire frogs are invincible and follow the player for an unlimited amount of time, unless the player dies, summons a replacement minion, or cancels the buff.

Its best modifier is Mythical: Unlike most summoning weapons the Mythical modifier provides an 18% damage boost similar to the Ruthless modifier, along with its other stat bonuses.

Trivia

 * The summon may be inspired from a Vietnamese flying frog, the "vampire flying frog" or "vampire tree frog", which has a pair of fangs during tadpole stages