You want proxies that honor your effortcards that pass the "shuffle test" and feel indistinguishable from the real thing
First Strike, Trample, and Lifelink
So, building around TAUC mechanics like convoke and station is a way to access game-breaking tempo plays essentially for free, as a reward for doing something which is already valuable on its own at all points of the game
The deck also runs useful enchantments to trigger delirium, allowing Fear of Missing Out to enable some scary turns as your big fliers get to attack twice
Delighted Halfling The legendary restriction on Delighted Halfling is becoming less and less of a real drawback, since most of the best creatures being printed these days are legendary
Even if you can't discount this, it's a solid removal sell, and it'll cost 2 often enough