Lesson decks in Standard are powerful because they have many ways to cycle through the deck, like Artist's Talent or Abandon Attachments, while building a graveyard for Accumulate Wisdom
I think it was well handled (for the most part), and the new mechanics that were introduced with this D&D set are super fun
Activate only if you control an artifact." If you control Spire of Industry and Reflecting Pool, you can tap Reflecting Pool for any color of mana
Since shipping cost is a huge difference in price between Standard shipping and shipping with Track & Trace here in the Netherlands
Because this is an Item and not a Supporter, it does not use up your one Supporter use in the turn
Rock Guard The precursor to Bursting Balloon, having this on, makes your opponent think twice about attacking, 60 damage and it stays on until your Pokemon is knocked out, or the tool is discarded