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Green is not traditionally an artifact-supporting color, but there are more than enough Artifacts in Blue for the Sixth Doctor to boost alone, making him an incredibly potent new commander

They also have a Trigger Effect upon Special Summon, like adding more Spright Cards from the Deck to hand, or negating an opponent's card

There is a limitation - the artifact enters with a Finality counter, which will exile the artifact if it's ever sent to the graveyard, shutting down infinite recursion loops

The idea is pretty simple: Banette or Dhelmise are your best attackers in normal situations and if you see an opening, you can simply change your opportunity to spreading damage counters with Sinistcha or Sabeleye