In this case, you'll create a 0/0 white Spirit creature token, which will likely immediately die unless something else is raising its toughness
Part of that stems from the fact that you cant target different opponents for the repeat effects
Cadric, Soul Kindler is happy to be your Commander and let you double up on Legendary permanents and yes, that includes Planeswalkers and Enchantments
Week 1 Ikoria frequently had players on 14 to 15 lands, but this eventually gave way to the 12-land minimum you see here
The most hyped one is, of course, the blue one in the cycle
In particular, what (vocal) Explorer players want are the 30-ish or so cards that would make pretty much all top-tier Pioneer decks playable on Arena