But before I start explaining what I think, I would like to clarify that all the critiques are not directed to the designers, or the design itself, but to the bigger concept
The two target permanents don't have to share a type, which can result in some counters on permanents that would not occur normally, such as loyalty counters on creatures or +1/+1 counters on lands
Whether you're in for a spelunking Tomb Raider, Space-themed staples, or the alluring Goldblum, each Secret Lair will cost you $29.99, or $39.99 for a foil version
The mana sink on this is just the thing to keep it relevant and avoid any board stalls
V Pokemon and holos are little more than glorified common cards nowadays
Drop her on turn three, make two 1/1 hasties, swing, keep all of the loyalty on your leader