Elemental Hero Stratos [PT03-EN002] Common Rare Set: OTS Tournament Pack 3

Set: OTS Tournament Pack 3 Card type: Effect Monster Rarity: Ultimate Rare Attack: 1000 Defense: 500 You can Special Summon this card (from your hand) by discarding 1 other WATER monster

if this card is the only monster on your side of the field

after damage calculation you can remove from play that monster and this card

This card cannot be destroyed by battle with a DARK monster

you can even find:

Elemental Hero Stratos [PT03-EN002] Common Rare Set: OTS Tournament Pack 3Set: Pharaoh Tour Promos Card type: Effect Monster Rarity: Common Attack: 1800 Defense: 300 When this card is Normal or Special Summoned: You can select and activate 1 of these effects: Destroy Spell or Trap Cards on the field up to the number of "Elemental Hero", "Destiny Hero" and "Evil Hero" monster you control (not counting this card). Select and add 1 "elemental Hero", "Destiny Hero" or "Evil Hero" monster from your Deck to your hand.