Green Goblin, interestingly, is goblin tribal, buffing up other MTG goblins when you discard cards
For a mill deck to be viable in Commander, it has to target all opponents and turn mill into damage or some other benefit, and you should aim for big/infinite combos when possible
An extreme form of copying original cards is forgery of expensive cards, which is again outside the "proxy" category
Suture Priest + Blood Seeker Ive put Suture Priest and Blood Seeker together as functionally identical reverse impact cards, because they only reduce life totals when opposing creatures enter the battlefield
Unlike Hades, Lord of the Underworld, Snow White lets you do this every time she quests, which could result in multiple cards being added back into your hand