It lets you remove any kind of counter from any kind of permanent, turning it either into a +1/+1 counter for a creature or a charge counter for an artifact
For the last section of this article, I'd like to point out which decks you should build first to have a balanced and fun experience getting into the format
New Magician monsters that excel at disappearing acts, providing useful effects when destroyed before moving to your Extra Deck to be Pendulum Summoned back for the grand finale
If you're building a deck on a budget, I'd aim to grab two of the cheapest tutors available to you
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Most of these will impact EDH in some form or another, and there are plenty of new commanders to try, new ideas to build decks around, and countless combinations between different doctors and their companions