Elemental Hero Mariner [DR04-EN214] Common Gold Rare also if you take battle

also if you take battle damage from that battle

Once per turn: You can discard 1 card to target 1 face-up monster on the field with original ATK less than the ATK of this card

Set: Return of the Duelist Card type: Effect Monster Rarity: Ultimate Rare Attack: 1000 Defense: 1000 When this card you control is destroyed by your opponent's card (either by battle or by card effect) and sent to your Graveyard: Shuffle this card into your Deck

The Special Summoned monster is treated as

Level 5 or higher monsters cannot be Special Summoned

Elemental Hero Mariner [DR04-EN214] Common Gold Rare also if you take battleSet: Dark Revelation Volume 4 Card type: Fusion Monster Rarity: Common Attack: 1400 Defense: 1000 E Hero Bubbleman + E Hero Featherman This card can only be Special summon by Fusion Summon. When you have any set card in your magic & the trap card zone. This card can attack the opponent directly.