Could you use Filled Feather Dragon to overcall the jewel knights and trigger their auto skills while placing them down with feather filled dragon's effect? Ex: I activate Feather Filled Dragon to draw 4 and place Morvidus 1st, than another Morvidus to draw a card and then continue until I finish calling down.
when you call multiple cards at the same time, you have to call to separate rearguard circles. If it worked that way, this card would be so much better