Its incredibly easy to tap creatures in these colors, be it with white tappers or with artifacts, or with blue creature spells that enter and tap/freeze other creatures
Volo tears away your opponents hopes for an easy two- or three-Prize knockout by discarding one of your Benched Pokmon V (including VMAX, V-UNION, and VSTAR)
Popular choices for Item/Trainer/Support cards in this structure include the essential pick of Misty for getting those Energies equipped, as well as cards to draw from your deck, filling in gaps - Professor Oak's Research and Poke Ball are solid choices here
The real power comes from how flexible it isyou can generate tokens, buff your creatures, or fuel combos
But just like how if you're using Elvish Piper to put a creature onto the battlefield, if you use something like Walking Atlas to put the Glade onto the battlefield, you don't have to worry about paying since it's put onto the battlefield instead of being played