Thunderbolt
Thunderbolt increases Attack Power by 30% in the Standard and Superior descriptions; the Superior version adds a weather-dependent critical-hit effect.
How it works
The item table describes Standard Thunderbolt as increasing Attack Power by 30% for 30 seconds, with 25 toxicity. Superior Thunderbolt is described as increasing Attack Power by 30% for 90 seconds and making all attacks critical hits during cloudy weather. The table lists Enhanced Thunderbolt too, but gives no numeric increase for that version.
When it helps
If considering the Superior effect, note that its all-attacks critical condition is limited to cloudy weather in the passage.
Read the supporting references
Source-bounded reference to Signs, weapon categories, alchemy effects and limits, Witcher Gear tiers, and ability progression. The passages cover The Witcher 3 systems but do not verify that every described mechanic applies unchanged to the remastered release. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.