Mystic Swordsman LV4 [SOD-EN012] Ultimate Rare Ancient Prophecy You can only use this

You can only use this effect of "Eidos the Underworld Squire" once per turn

Set: Premium Gold: Infinite Gold Card type: Quick Play Spell Rarity: Gold Secret Rare If a monster you control attacks a monster whose ATK is higher than itself during damage calculation: Your battling monster gains ATK equal to the difference between your LP and your opponent's

you can send this equipped card to the Graveyard to allow the equipped monster to attack twice during each Battle Phase this turn

During each of your opponent's Standby Phases: You take 800 damage

Mystic Swordsman LV4 [SOD-EN012] Ultimate Rare Ancient Prophecy You can only use thisSet: Soul of the Duelist Card type: Effect Monster Rarity: Ultimate Rare Attack: 1900 Defense: 1600 If you Normal Summon this card, you must place it in face down Defense position. If this card attacks a face down Defense position monster, destroy the monster immediately with this cards effect without flipping it face up or applying damage calculation. During the End Phase of a turn that this card destroyed a monster as a result of battle, send this