While putting them directly into play is admittedly more efficient, theres really no downside with Merens ability only good scenarios and better ones
Along with a few trainer cards and Pok Ball item cards to help cycle through the deck more quickly, this initial setup lets Mewtwo take the active spot while Ralts builds up to its Stage 2 evolution, Gardevoir
Negating the effects and attack of a high-cost character for a turn all but ensures that your opponent will struggle to deal with this 12000 power [Blocker]
For example, if you activate Crypt Rats and pay X=5, then copy that ability, both resolutions of the ability will deal 5 damage
Lets say your opponent casts [c]Harmonize[/c] with the intent of drawing three cards
A 2/2 Shark meant your opponent tapping low for a Narset would be a single -2 activation, so even a small Shark matters in Sultai Midrange mirrors