Devotion with Mutation

{"ops":[{"insert":"The devotion is determined by the topmost card of the pile. For example, you chose to mutate your "},{"insert":{"card-link":"Brokkos, Apex of Forever"}},{"insert":", onto an "},{"insert":{"card-link":"Elvish Mystic"}},{"insert":". and in a terrible misplay you put Brokkos under the mystic. The devotion that mutated pile would add is G. Just one green devotion, Brokos adds nothing. Then you cast "},{"insert":{"card-link":"Drag to the Underworld"}},{"insert":". You would have to pay 2BB. On the other hand, maybe you had a "},{"insert":{"card-link":"Phyrexian Obliterator"}},{"insert":" on the field. You decided to mutate Brokkos under the obliterator. Even if you were targeting a "},{"insert":{"card-link":"Boreal Elemental"}},{"insert":" with "},{"insert":{"card-link":"Drag to the Underworld"}},{"insert":", It would only cost BB, as your devotion to black is 4. If Brokos were on the top of the pile "},{"insert":{"card-link":"Drag to the Underworld"}},{"insert":" would cost you 1BB (or 3BB if you are targeting the "},{"insert":{"card-link":"Boreal Elemental"}},{"insert":"), even if you had "},{"insert":{"card-link":"Phyrexian Obliterator"}},{"insert":" underneath Brokkos.\n\nI hope that helps! Have a great day.\n"}]}