Unknown ground, dangerous valley

World: Exploration World

Type: Spell

Attribute: Unknown grounds.

Cast cost: pay 1 life and 1 gauge 

Effect: You may [set] this card. 

“Aggressive environment” all of your “Exploration World” monster gain + 3000 in attack, +1 in critical and +3000 in defense.

You may only set one “unknown grounds, dangerous valley” on your field. 

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