Sometimes this deck can feel like a numbers game, cause much of the deck is designed around getting to nine mana as quickly as possible, with access to all five colors, so you can drop The Ur-Dragon and then start attacking to trigger its attack effect
Instead of attacking for 3, 4 and 5, it attacks for 2, 3 and 4, and a lot of the time a creature cant attack because it doesnt have the counter, so the nerf ends up costing eight or so damage in a game
The second starts down two cards and three life but your lands tap for 2 mana so you'll get a 2-drop on turn one, a four-drop on turn two, and Kokusho the Broken Star on turn three
Joust Through One of these days theyre gonna have to print a version of this effect that cantrips, right
Minsc & Boo, Timeless Heroes can be your commander.