The five rares from March of the Machine Jumpstart Boosters also appear in extended art, as do 42 rares and 12 mythic rares from the March of the Machine Commander set
Once the Battle card has been defeated meaning that all of its defense counters have been removed the card is exiled and the reverse side is cast
They're treated the exact same as any other card in that they sit in your deck waiting to be drawn, have a limit on how many a deck can have and have a mana cost needed to cast them
Dynavolt Tower: I see it best in a Blue/Red Instants and Sorceries deck
The proliferate mechanic is a great way of triggering Sagas at instant speed, and things can get really out of control if you combine proliferate with cards that can remove counters (like Chisei, Heart of Oceans, Power Conduit, Hex Parasite, and the like)
(Unless I'm Morph-ing) Foils and Foil Stamps OK, so what about those foil stamp sticker sheets