Take Lurrus of the Dream-Den as an example
To use the Relentless Rats again, if the Rats prove popular but not troublesome, it increases the chances of R&D breaking the four card limit rule again
As the rules read for alternate costs, If an alternative cost is being paid to cast a spell cost reductions that affect that spell are applied to that alternative cost. When you declare youre using the prowl casting cost, all reduction effects then reduce the amount of mana youre alternately paying for the spell, not its original MV
The good news is that both are extremely popular in casual circles, and one sees play in Modern
First Edition Pikachu (Yellow Cheeks) #58 Estimated PSA 10 Gem Mint Value: $1,500 Though it may not be as expensive as the rarer red-cheeked variation, the Pikachu card featuring the lovable face of the franchise with yellow cheeks is still quite expensive in high grade