at ultra rare quality the regular beam turret upgrades to a flamethrower turret with a short range attack additionally to the regular long range attack.
would be cool if the turret was upgradable to epic (gold) quality aswell.
how about it upgrades to a "lightning turret" that deals electric damage and its shots bounce between all enemies in range?
it could even randomly change to any exotic damage type (radiation, poison, fire, cold) with a different effect dependent on the damage you roll. like the turret dealing radiation damage could cause radiation clouds upon crit or enemy kill, that linger and deal aoe damage.
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