The ability to hit really hard beginning on the third turn along with playing nicely with Harnessed Lightning pushes toward a Red-Green Energy deck with explosive potential
You'll need roughly 1 packs for full coverage
A large part of group hug decks are incentivizing your opponents into attacking each other rather than you, and The Second Doctor does a fantastic job of that
Get through 60 cards (or 100 if you're playing Commander), and then play Laboratory Maniac to win the game without ever needing to even scratch your opponent's life total
Using this card in a black/green Golgari self-mill deck would definitely benefit more than a few cards like Fiend Artisan or the dreaded Gitrog Monster
These are the big, dramatic cards: Planeswalkers, Legendary Creatures, massive mana-intensive spells, and chase cards that are playable across multiple formats