Because of the way Cascade was worded at the time, you could Cascade into Valki and cast the flip side of the card from exile, which happens to a seven mana Planeswalker named Tibalt, Cosmic Imposter
While the dream of owning the same Magic cards in paper and on MTGA is pretty much nonexistent, these definitely allow you to get some digital value
What do you mean, you expected Ancestral Recall to finish first
These replay land effects give you plenty of fodder and ensure that you dont fall too far behind when you sacrifice your mana sources
They don't all have to be creatures, you can use treasure or food as well
I'm not particularly high on Vadrok, but I can see some value there and I haven't even looked at all the enchantments you could cheat back out onto the field