You seriously wouldnt think they are proxies
If such an effect refers to the found cards, it can't see them in exile
The boosters will each include 20 cards, including two legends and a foil card
I can imagine it getting pretty annoying if we keep resetting our health total to ten multiple times as the opponent may need to keep committing to lethal attackers, which could end poorly if we play settle or if we can find the time to sweep the board
Aggressive decks will love to cycle away excess land, but they may be rewarded with a Toolcraft Exemplar where we receive a Torrential Gearhulk
Im also going to look specifically at anything that can be found in Play boosters, which includes the main set, Special Guests, and a selection of Commander precon cards, but Ill mention when these cards pop up