This card only allows lands to produce black mana and also prevents powerful lands from producing more than one mana at a time
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Emet-Selch of the Third Seat's first ability)
To supercharge these effects, the best enablers are cards that add, move, or multiply charge counters
It is a good idea to have a common that you know is legitimate from the same set when doing side by side comparisons
Copying artifacts and enchantments can get out of hand, though this is all fiddly enough that I wouldnt expect it to be too problematic
Each Pokmon card has a set amount of health points, which, when they are reduced to zero, cause that player to discard that card and play a new Pokmon card in their place