Try a few spells

You can't help but smile as you grab the wand,not only were you a king,but now also a wizard! That's like,two childhood dreams/power fantasies you had that are now true!,you play whit it for a bit as you wonder what kind of spells you could do,before realizing you did not know any spells

You are about to ask Jonah for some basic level spells but a tingling in your mind stops you,it felt like a gut feeling,that you did not actually need Jonah’s help here,that perhaps,if you just wished for it,you could do any kind of magic spell,maybe it was your ego talking,but wanted to try it,but how?

Looking back,Rodrick is still behind you,it's quite clear the dragonborn is not used to his new weight,he was sweating buckets,almost as if he was getting tired from just standing up you actually wonder if he would be able to move with the extra poundage?,you could also see,that despite him trying to keep a curious face,Rodrick was clearly blushing,you found that extremely cute,a devious smile forming as you decide what to do

You raise your wand against Rodrick,who looks a bit nervous “um,your highness,are you perhaps trying to make me fatter? While i must admit it is quite comfortable,i feel i wont be able to work as your advisor if i am immobilizeEEEAURPP” the burp reverberates through the room,as a blue tinted mage hand presses the dragonborn’s huge gut

“Woah! A mage hand already?” Jonah says,clearly impressed “that takes quite a bit for mastery!”,you continue to point the wand at Rodrick as more mage hands appear,the dragonborn’s blush intensifying as each hand begins to fondle and rub him,a pair of hands were pressing his fattened moobs while a few more were continuing to poke at his belly “you-your highness! This is quite impressive but-this maybe is too muc-OH” Rodrick gasps as another mage hand slaps his behind,the dragonborn’s asscheeks undulating as if they were filled whit liquid

You laugh wholeheartedly,happy to be able to manhandle the dragonborn in such a way,and also knowing this is just the tip of your magical prowess