feat(spell): Allow to define critical effect target

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.38%. Comparing base (bd28882) to head (224a4c1). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #337 +/- ## ========================================= Coverage 96.38% 96.38% - Complexity 9095 9109 +14 ========================================= Files 1403 1405 +2 Lines 23249 23278 +29 Branches 1479 1483 +4 ========================================= + Hits 22408 22437 +29 Misses 634 634 Partials 207 207 ```

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