Youre supposed to collect digital cards, not real ones
Bouncing can be used as a stalling technique, such as when you force an opponent to recast an expensive creature, a way to grant you a second chance to counter a problematic permanent, and a excellent method to kill tokens
As for Celesteela, you can use the Ultra Thrusters ability to trigger a free Active Pokemon switch for Ultra Beasts only
You can see that it is possible to attach "Lion Sash" using "Magnetic Theft." The question is, what happens if the target it is being attached to has protection from creatures
As time goes on, this will likely change to see Floragato take the lead, as it is one of the most popular Starter lines
That might not be a whole lot of mana for your Commander group