🗿 notawikiAcross the Obelisk Codex · the answer, not the article

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0Thunderstorm
Monster · Corruption
All monsters gain: All damage +1 Lightning resistance +15% -Every round- Add Storm to a random monster.
Uncommon▸ Monster

Thunderstorm

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monster  Monster cards (enemy)
KeywordsElemental (Fire / Cold / Lightning)
Played by 1 source›
Captain enemy
Upgrade paths›
Upgrade A (yellow) · Uncommon · cost 0
All monsters gain: All damage +2 Lightning resistance +25% -Every round- Add Storm to a random monster.
Upgrade B (blue) · Uncommon · cost 0
All monsters gain: All damage +2 Lightning resistance +20% -Every round- Add Storm to a random monster.
Corrupted (purple) · Uncommon · cost 0
All monsters gain: All damage +3 Lightning resistance +30% -Every round- Add Storm to a random monster.
Other listed version 1›
The wiki lists two versions — probably base and upgraded. Both are shown.
Cost 0 · Rare
Deal 7 Lightning. Apply 2 Spark, 1 Wet. Repeat 1.