Notably, Neriv doubles all damage, not just combat damage, so you can do some disgusting nonsense with cards like Fanatic of Mogis and Overlord of the Boilerbilges
Here are some places I like this: Spellslinger - Alongside triggers like Guttersnipe or Talrand, Sky Summoner in Izzet, with Jeskai or Boros with Young Pyromancer or Monastery Mentor
In some rare cases, a nonartifact card put onto the battlefield this way will get two +1/+1 counters because some other effect (like that of Mycosynth Lattice) makes it an artifact on the battlefield
But if you dont like Bouncelands and you prefer shooting directly to your opponent, Primeval Titan has a place even in the RG Scapeshift deck, searching for the lands you need to win
What are the key cards in my opponents deck
For Commander, I think they are both at the very least solid cards but become much better the higher-power Commander you like to play