Not officially confirmed by Bandai
Experimental Lab // Staff Room is a solid option for counters decks, but at this point, we have so many solid options that its entirely based on flavor and what you have in your collection really

A rare (80.4%) or mythic rare (14.2%) from Edge of Eternities 's main set A rare (2%) or mythic rare (less than 1%) borderless triumphant card A rare (2%) or mythic rare (less than 1%) borderless surreal space card A mythic rare (less than 1%) borderless viewport land 1 Traditional foil card of any rarity A common (58%), uncommon (32%), rare (6.4%), or mythic rare (1.1%) from Edge of Eternities 's main set A rare (1%) or mythic rare (less than 1%) Stellar Sights land A rare (less than 1%) or mythic rare (less than 1%) borderless viewport, triumphant, or surreal space card 1 Land A non-foil (64%) or traditional foil (16%) default frame basic land A non-foil (16%) or traditional foil (4%) borderless celestial basic land 1 Non-foil double-sided token Please note that Play Boosters no longer contain ad cards or art cards
However, one of the main issues that currently faces Pokmon TCGP is that, at launch, there is only one set of cards available
Prophecy struggles to even live up to the reputation of the first two sets in Masques block, which were themselves widely regarded as a watered-down follow-up to Urzas block