Once per turn, during the End Phase: You can target 1 Monster Card equipped to this card by this card's effect
A deck focused on Mathmech monsters, particularly one that relies on Synchro or Xyz Summoning, would benefit from using Mathmech Superfactorial
But in all cases, alternative costs follow a simple template: [If you meet the proper conditions], pay N instead of this spell's mana cost [and then these other things happen, too]. Alternate Costs vs
This would never be seen on a genuine card, nor would the broken and incomplete letters of the stamp
Lastly, the Poison and Burn markers are important to have to keep track of these two status conditions, and youll need to have them with you (or something else that can be used to track these conditions) whenever you play at a tournament
We also ended up making a couple tiered spells that represent limit breaks