Talk:Warlock Mask/@comment-25402789-20140918195503/@comment-3236835-20150404050117

You can try wearing gear that boosts Item Discovery, like the Traveling Merchant Hat, which can be bought from Melentia very early in the game. Also, if you're familiar with the exact spot on the field that triggers Roenna's spawning, you can be prepared and pop a Rusted Coin to boost your luck beforehand. If you're playing the PC version, you can actually make a backup of your save file and try as many times as you want.