When the 4 creatures are on the battlefield together, you activate Mirror Entity's ability for roughly a thousand times (or realistically as many times as u want) and X=0
Its not a complete board wipe, but it can give you great value for the cost
Leafeon VSTAR in the Pokmon TCG has a unique special VSTAR power called Ivy Star and is priced right now at $21.50 USD on TCGPlayer
First I needed backgrounds and symbols from typical Pokmon cards, fortunately there is a whole community dedicated to making fake Pokmon cards and I found all the assets I needed over at PokemonCardResources
Notably, if you add the tenth point counter some other way, no one will lose the game
Some cards with Madness even have their cost as zero, such as Call to the Netherworld, allowing you to not even need extra mana to cast them for even more mana.