This mainly means they cant search for lands, which in multi-colored decks is a big problem
Where the World Championship decks showcased the strongest strategies and combos from that season, Theme decks and their successors (Starter packs, Guild Kits, Planeswalker Decks, etc.) usually revolve around a specific sets mechanics and act as an introductory product more than anything else
Ascended Heroes has wasted absolutely no time cementing itself as one of the most expensive modern Pokemon TCG sets ever released
You had me at "spaceplane." The Seriema is part Mausoleum Secrets and part Avacyn, Angel of Hope because once you Station it to 7+ power, all your tapped legendary creatures gain indestructible
Grandmaster Wizard is powerful for the fact he draws you 3 spells but having a cost of 6 mana can be challenging to play against fast aggro decks
I am not a fan of this type of effect because you still need the mana to cast them, but it can help a lot after a board wipe
