This card should have flying, a dork of this type should be at least this size, etc
First of all, each player starts the game at 40 health instead of 20
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
It can be used to ramp out powerful cards and effects earlier in the game than normal, and is both mana ramp, and color fixing
However your early creatures died, you can bring them back for another go
That is because your Arid Mesa can point at your Hallowed Fountain, and so can your Misty Rainforest, and you have to draw through some insane percentage of your deck (in a format that sometimes ends on the third turn) before it catches up with you