由
1.
How Counterspells Work
To use a counterspell, you must select an opponent as the target of the counterspell.
2.
To complete the action, you must then cast the correct spell.
3.
If the target is within range, both spells automatically negate each other with no other results.
4.
Target or Targets
You must be able to see or touch the target, and you must specifically choose that target.
故
1.法术反制需要视线以及效果线
需要视线的理由是没有视线就无法取目标为法术反制的target
需要效果线的理由是range和效果线挂钩,是法术能生效的最大距离
2.有,见上述3
3.个人觉得视法术而定,若反制掉的法术本身不会打破隐形,那么施展这个法术来反制法术也不会打破隐形