#3 Blightsteel Colossus Double Masters, Mythic Creatures that can win with one swing are a relative rarity, but Blightsteel Colossus can pull off quite the Phage the Untouchable impersonation
The only problem is that the populate effect goes on the stack first if you cast a spell that makes a token, so its better to cast this after you already have some tokens
You dont even need to have attacked, because discarding a card is sometimes an upside, allowing you to trigger descend cards and the like
Kodama of the East Tree When you see enough Commander games, you get to know all the usual suspects: Sol Ring, Command Tower, etc
Doctor Doom rewards you for discarding lands, either for conniving or for any reason, so my favorite pick here is easily Tectonic Reformation
Some of them have aged better than others