Maybe a turret with an attack that deals more damage over time. The turret should be called the Inferno, the Charger, or something like that. The damage would be from 49 charging all the way up to 300. And, since the turret will be powerful, it should cost like 600-1200 crystals. Once the damage gets up to 300, it would go back down to like 70 and charge back up. For the range, it could be a a little smaller than the range of the Firebird. The reload time would something like 5-7 seconds.