Example 1: If N(g) exceeds N(t) by 1 (+1), the chances become 30%/25%/25%/20%. With a difference of +4, the chances become 45%/25%/25%/5%. A difference of 5 cannot further reduce the probability of the last outcome and reduces the probability of the second to last: 50%/25%/20%/5%.
That is, regardless of the number of goblins, there is still a chance of failure. In addition, there is a doubling of mana and a reduction in spell power, so there is no 100% chance of spells failing, no matter how many goblins there are.
And this has been tested in practice. For example, there was a time when the opponent had about 3200 goblins, and Darkness still worked. Play more.
