Board Thread:General Discussion/@comment-26366000-20150601133703/@comment-26389707-20150605013908

You can use a Cutlass that is a drop from a Pirate Invasion + Full Hallowed Armor and with Hallowed Mask and get at least 1 Greater Healing Potion and also full golden hearts and for the attacks, just stay in one place and swing the Cutlass until you defeated it. That is how I defeated Plantera.