The Vanguard are a trio of Xeric's former commanders.
There are three Vanguards, which are underground. When a player gets near one of the holes, all three will burst from the ground.
Each Vanguard uses one side of the combat triangle: Melee, Magic and Ranged. The melee Vanguard has tentacles flailing out, the magic Vanguard has no tentacles flailing out, while the ranged Vanguard is carrying rocks. After a short period of battling, the Vanguards will return to the shells and move around the arena; during this time, they are immune to attacks.
To harm the Vanguards, damage must be spread equally to all three Vanguards. It is unknown how much of a difference there must be between their Hitpoints, but if one Vanguard's health is significantly lower then the others, that Vanguard will heal to full health when they move around, prolonging the fight. If the Vanguards are at or near the same health percentage, they will not heal themselves.
Verac's armor set appears to be effective against the Vanguards
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