Sidisi, Regent of the Mire is basically Birthing Pod but for your graveyard (deathing pod?)
You can drop all of your mana rocks early before Codie comes down, then get rid of Codie with something like Infernal Plunge to remove the restriction before you close things out
Interrupts were considered faster than instant spells and would resolve before anything else unless there was another interrupt being played
If a land card is revealed this way, put it onto the battlefield tapped
I just love the idea of trying to cascade Sweet-Gum Recluse into Ishkanah, Grafwidow, but thats when youre focused on spiders and not, you know, cascade
More specifically, the first deck is called World Shaper, and it has many cards dedicated to gaining benefits from sacrificing lands and playing multiple land cards per turn