Kaheera, the Orphanguard 10
To round out the decklist, consider Rotom V, as it helps us set up in the early game with its Instant Charge ability, a Lumineon V, as it lets us fetch any Supporter we need, and Fezandipiti ex, which lets us draw extra cards when the opponent takes a knock out the turn prior
Doing the same, this Secret Lair reprises that iconic style to create some truly gorgeous cards
will be exactly the same
Other missions have more specialized criteria for completion, such as obtaining both an Electabuzz and a Magmar card, or completing the legendary bird trio (Zapdos, Articuno, and Moltres)
For just five mana, you can give all your Elves indestructible until end of turn, saving them from any number of board wipes that your opponents might be holding on to