You add an additional to the cost of X for every mana reduced by your cost reducers
If your "Kashtira" or "Scareclaw" monster battles an opponent's monster, that opponent's monster's effects are negated until the end of this turn
Sometimes you have to read between the minds
But if you want an experience somewhat close to that, The Fertile Lands of Saulvinia can give you a pretty good approximation, launching the table into the late game extremely fast
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Light played "Trap Dustshoot" Played Caius the Shadow Monarch Poor "Abyssal Kingshark" The remaining three conditions scale the level of card damage, and it becomes questionable whether such cards would be legal for tournament play