if a Tortle has fly cast on it, can it still fly if it retracts into its shell? Yes. See visual evidence to confirm. pic.twitter.com/m6mq8Pf9yG
— Mike Mearls (@mikemearls) September 24, 2017
if a Tortle has fly cast on it, can it still fly if it retracts into its shell? Yes. See visual evidence to confirm. pic.twitter.com/m6mq8Pf9yG
— Mike Mearls (@mikemearls) September 24, 2017
Per the Tortle Package, “while in your shell, your speed is 0 and can’t increase”, so I would say no, you cannot fly while shelled up.