When Fastbond was still in print during Revised, you had a faster way to boost the Leige, but by Fourth it was just a waiting game, if you could stay alive that long
It reduces only the generic component of that cost
Combined with other counter-giving cards, Sphere Grid can quickly become a significant problem for players without a proper way to deal with trample , especially with cards that trigger off of opponent damage
Since it doesn't negate the effect, it's a somewhat hollow removal effect
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You can not activate any spell or trap cards during your next turn, except "Deck Master" cards, and "Master of Dueling"