That's good, even at such a high cost, yet Scour from Existence is strictly better at 7 mana and instant speed
however, it was only a few savvy Junior divisions players that had embraced Demonic Consultation (largely, as a way to find Necropotence, although Hymn to Tourach, Dark Ritual, Drain Life, and Swamp were all pretty good choices too)
The Mana Base I play my Prosper deck with relatively few lands thanks to the huge amount of Treasure tokens you get to put into play
Last March of the Ents : Another toughness draw option, draw a card at the beginning of your upkeep if you possess the creature with the highest toughness
One example is Spara's Headquarters from Streets of New Capenna , which is like Seaside Citadel 2.0