Mist Valley Thunder Lord is a Secret Rare Synchro Monster card from Yu-Gi-Oh! (Hidden Arsenal 2, HA02). Current market price: $0.06.
Secret Rare
Hidden Arsenal 2 (HA02)
Card Text
1 Tuner + 1 or more non-Tuner "Mist Valley" monsters
Once per turn, you can select 1 card you control. Return it to the hand, and this card gains 500 ATK until the End Phase. This effect can be activated during either player's turn.
