They cost four or less and protect themselves the turn they come into play
Nettlecyst does the same but tracks all artifact and enchantments, so its even more explosive in decks that go wide those card types
I think both decks will be fun to play and have the potential to be upgraded into more powerful versions
You can be a multiversal threat like Nicol Bolas the Dragon-God, the most ancient evil in Dominaria
Many of these creatures have powerful secondary abilities including creating additional creature tokens (Bladewing, Death Tyrant, Feldon, Kari Zev, Krenko, Mardu Strike leader), drain/life loss (Calculating Lich, Hellrider), direct damage (Combustible Gearhulk, Dreadhorde Butcher), anthem/buff effects for your army (Drana), card draw/free spells (Etali, Florian, Garna), additional combat step (Moraug), and many more
Well, yes, walls sort of count as defenders but actually no