@JeremyECrawford taking bonus action to emerge from shell means the Tortle can take an attack after emerging during that turn?
— D&D Character Lab (@dndcharacterlab) September 16, 2017
You decide when you take a bonus action on your turn, unless that action's timing is specified. See "Bonus Actions" (PH, 189). #DnD https://t.co/xWHkDEXuX0
— Jeremy Crawford (@JeremyECrawford) September 16, 2017