Speaking of that, expend is a new rules term that tracks how much mana you've spent to cast spells over the course of the turn
This one costs five mana instead of four and doesn't include a way to cast it for free, but if you're looking for a type manipulator in Black, this is one of your best options
Jamine Dragon Tea Shop The Ally deck will need mana fixing, and this will likely be part of it
While this does suck for people who have spent a lot on cards that are now plummeting in value, my hope is that this also serves to lower the price of cards in general
If you want to summon in Hidden ATK or Hidden DEF Position an Integration Summon you are not forced to reveal the eroded material card right away, but when you erode it you must set it clearly apart from other cards, and once your monster is revealed or the duel ends you must reveal that the eroded card was the proper material, otherwise you lose the duel instead