Damage removed due to regeneration is still dealt with, though
You can recur any permanent from your graveyard to the battlefield
Using an absurd amount of almost useless creatures like Saprolings to cast spells without having to use lands can give you a huge advantage
Then at level 2, anytime a noncreature, nonland permanent comes into play under your control, you get to put a +1/+1 counter on a creature you control, letting you buff your Wall or any other creature you might have
You must do so even if it requires targets and the only legal targets are ones that you really don't want to target
Presumably, then, there'll be a fair few shrine cards, though we wouldn't say it's 100% guaranteed