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Mysterious Gem official Trinket icon
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Batomon Showdown // Trinket reference

Mysterious Gem

Your monsters have +20% Damage.

TrinketLegendary??? · event & specialSteam build 26170127

Trinket details

Rarity and availability

RarityLegendaryGame tier 5
UniqueNo
Region??? · event & specialGame collection
Game build26170127Effect version

BatoForge strategy notes

Using Mysterious Gem

Mysterious Gem gives your monsters 20% more Damage. High base values receive the largest flat increase, across any mix of types.

When it fits

Several useful direct-Damage skills and enough survival to cast them make a good starting point.

How to use it

Find the units doing most of your direct damage. Compare the percentage gain with a flat-Damage gift, accounting for cooldowns and how often their skills can fire.

Example

With no other modifiers, 150 Damage gains 30, while 20 Damage gains 4. The same percentage adds more to the larger starting value.

What you give up

The gem adds no speed or Trainer HP. When attackers cannot act in time, speed or survival may solve the immediate problem.

Build 26170127 · Updated October 20, 2026 · About these guides · Report an issue