Take the Promising Stairs, and while the other side helps you tutor for rooms, the right side can win you the game with just four split cards
While being a permanent should remove the element of surprise, it is amazing how often the players involved forget that Kessig Wolf Run is an option
And then F (or Z tbh) for junk slabs
Smothering Tithe is a Treasure generator like no other, generating more mana in a Commander game than almost anything else
But the real payoff comes when that creature connects with a player
For creature matchups, we have a motley crew of blue cards, with So Tiny being our Sword to Plowshares, Warrant // Warden often permanently answering a creature since we can put it on top of our opponent's deck and then mill it away, Run Away Together offering some fun tricks where we can bounce our opponent's best thing and one of our enters-the-battlefield mill creatures, and Flood of Tears being our (very bad) Wrath of God