You can't attack with them the same turn you play them, unless they have haste
It's a little tough but I could see it potentially slotting in to my recent Commander Focus: Talrand deck
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Phasing is also an excellent tool, as it doesnt make your melded permanent leave the battlefield and split back into two consider stocking up on Slip Out The Back or Teferis Protection to ensure your hard work doesnt get undone immediately
The premium reflects how few survived in pristine shape from an event handout, where cards often got handled before they ever reached a sleeve
In gameplay terms, its a useful card with an unusual ability too it allows you to sneak a look at your opponents hand, then place a Basic Pokemon you find there on their Bench