Note that the Bazaar of Baghdad card from Arabian Nights and the Mishras Workshop card from Antiquities are nipping at the heels of this one in terms of value
Wall of Omens A lovely cheap Wall that cantrips, you can't go wrong sticking this in your deck
The burn spell has competed with Lightning Bolt in other formats (though Lightning Bolt usually ends up winning), and its extremely strong at swinging any kind of race, more than offsetting the life you lose to play an untapped Sacred Foundry
Conversely, by increasing the number of "Superheavy" cards, you could make it easier to complete Pendulum scales with fewer cards, or prepare negation cards against disruption cards like "Baronne de Fleur" before Pendulum Summoning, so I think it is also good to shift to a build that uses "Superheavy Samurai Prodigy Wakaushi" well
Pokmon means an awful lot to us, and I am interested to see what kinds of Pokmon-related items you own which mean something to you