If that counter causes Yorvo's power to be greater than or equal to the entering creature's power, it won't get a second +1/+1 counter
The idea here is to get a free shuffle for decks that care, like Sensei's Divining Top, Sylvan Library, Brainstorm or Scroll Rack and then actively push the table your way, or I like this as a reliable set of triggers in Spellslinger
If equipment is destroyed when attached to a creature, the creature it was attached to doesnt also die
Why they felt the need to create a flash threat that steals opposing draws and converts them into Treasure for you is beyond me
However, if it comes into danger, it has a Retreat Cost of one, allowing you to keep it out of harms way until you draw its next Stage