Cloudian - Acid Cloud (SGX3-ENH03) - Speed Duel GX: Duelists of Shadows 1st Edition

This card cannot be destroyed by battle. If this card is in face-up Defense Position, destroy it. When you Normal Summon this card, place 1 Fog Counter on it for each "Cloudian" monster on the field. You can remove 2 Fog Counters from this card to destroy 1 Spell or Trap Card.