There are basically two types of creatures in this deck:
• Creatures that can add +1/+1 counters cheaply
• Creatures that can use +1/+1 counters for something
and Volrath switches between these two types.
There's another known quirk with Volrath and copy effects: If you copy Volrath while it's copying something else (let's say a Triskelion), you get a copy of the Triskelion (not Volrath), and it also has Volrath's switching ability.
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Click here for my EDH Commander decks