Staff of the Frost Hydra

Frozen chest recovery and automated sentry placement

The Staff of the Frost Hydra is obtained from the Dungeon's Frozen Chest, unlocked with a Frozen Key after defeating Plantera. Using the staff summons a stationary three-headed Frost Hydra onto solid blocks that remains active for two full minutes. The sentry automatically detects hostiles within its vision radius and discharges high-velocity icy blasts that penetrate multiple oncoming targets.

Zero-downtime support damage and modifier selection

Each icy projectile inflicts 100 base sentry damage alongside heavy 7.5 knockback. Because it occupies an independent sentry slot rather than drawing from standard minion capacity, any character class can plant a Frost Hydra during boss encounters or invasion defenses to add free supplemental DPS. The Ruthless prefix provides the highest possible increase to raw sentry damage. It pairs nicely with sentry accessories and defensive choke point strategies.

Trivia

• The Frost Hydra can be stationed on submerged blocks underwater or suspended on single wooden platforms.
• Unlike minion summons, sentries like the Frost Hydra do not follow the player when moving between areas.