Legality depends on the tournament format -- The Bringer of the Red Beard can be legal in some formats and banned or restricted in others
Walk-In Closet // Forgotten Cellar might be the more straightforward playable room card: You just cast the 3-mana green enchantment first, and later when you have a filled graveyard, you get to unlock Forgotten Cellar and profit
This set is where we got the first-ever Charizard ex, and its been a hit with collectors ever since
It copies activated abilities, but both Kaalia of the Vast and Kaalia, Zenith Seeker have triggered abilities
As the inaugural set, Mega Brave introduced the MUR rarity and set the template for the series
The frog-generation ability represents their frog-catching obsession, while the "sacrifice a Frog for +1/+1 counters" tries to recreate their eat-to-grow-stronger philosophy