While theres a lot of synergy here, the cards are mostly strong independently, and the deck is designed to play a fair, interactive game that just happens to be able to gain infinite life with Urza and the Thopter Foundry / Sword of the Meek Combo, but mostly Urza, Oko, and Emry are all amazing standalone cards that require fairly different answers
Many protection spells, such as Akroma's Will and Heroic Reinforcements, only provide opposing boards with indestructibility, so exile-based wraths safely ignore them
Each Aura and Equipment that phases out attached to a permanent that's phasing out phases in with that permanent and is still attached to it
If you have a high density of Creatures in your deck, this is a cool way to generate a bunch of tokens at once
But Greg, Ariel is a Super Rare and Gaston is an Uncommon, so it should be better. While the rarity of a card certainly can play a part in its value on the table, its not always 100% the case