Some cards from this set as well as some from the previous 3 sets will get altered-border versions with higher than 204 numbering
Extra Combat spells are great for pushing for a win, but I'm unsure if the six mana on this spell will ever be worth it
For cards like Clay-Fired Bricks and Invasion of Vryn, simply getting an effect and leaving behind something to blink or sacrifice is good enough
Vastwood Surge has synergy in +1/+1 counter decks, for example, and Circuitous Route is a staple of gates decks
To be honest, I was trying to avoid being too specific about what I think you should do and was just responding to your own idea about adding more removal, but now that I've taken a more serious look at your deck, I do have a lot of very specific advice, if you're interested in that, and Longstalk will definitely be a more effective choice if you do decide to follow my recommendations
Still, the correct maneuver is usually to deploy the giant, implacable death lizard