If The Professor, for whom staying up to date with Magic releases is part of his job, couldnt even get his hands on the newest Secret Lair in time, its clear that more casual consumers never stood a chance
A mix of interaction and flash creatures gives you all the control, and you have more options over how you use your mana than youd have if you need to choose between tapping out for a 2-mana creature or holding up Counterspell
How Many Creatures Should You Put in a Control Commander Deck
Madam Mims ability to bring cards back into your hand or into your discard pile combos perfectly with Merlins ability to generate lore, grant other characters additional strength or draw cards as his cards enter and leave play
WotC has even rested the concept, releasing recent major sets with no serialized cards to let the market breathe.
Suddenly, small creatures disappear, planeswalkers lose loyalty, and life totals drop