You might think you get to untap them alongside Kill Switch and attack into an open board, but that's now how it works

Holds standard trading card in a sleeve 20 pt. thickness 2 piece design w/gold magnet Exterior Dimensions: 2.925" x 4.345" x .320" Interior Dimensions: 2.660" x 3.727" x .024"_These Pro-Mold Magnetic Card Holders have a recessed area that is large enough to accommodate the included, specially-sized sleeve. These sleeves are an added layer of protection for the enclosed card. This is especially important if you are protecting a shiny foil card, as the foil layer can get scratched if dust was on the card when it was placed in the magnetic. Using a sleeve minimizes the chance of the foil card getting scratched. There are many branded and hobby community names for these reflective foil cards, including: Chrome (Topps Bowman), Refractor/Superfractor (Topps), Otic (Panini), silver, rainbow, reflective, holo, Prism (Panini), Pulsar (Panini), colored refractor parallels, and more.This listing is for 10 holders

Transform is an ability that usually uses the stack, regardless of whether its an activated or triggered ability
The characteristics of the thirds you didn't cast are ignored while the spell is on the stack