Cloudian - Acid Cloud

[ Fairy / Effect ] Cannot be destroyed by battle. If this card is in face-up Defense Position, destroy it. If this card is Normal Summoned: Place 1 Fog Counter on it for each "Cloudian" monster on the field. You can remove 2 Fog Counters from this card, then target 1 Spell/Trap on the field; destroy that target. ATK/ 500 DEF/ 0