Forerunner of the Legion [Rivals of Ixalan] Nightmare Horror then you can Special Summon

then you can Special Summon as many monsters with that same name as possible from your GY

other than "Legendary Six Samurai - Kizan"

Set: Crossroads of Chaos Card type: Effect Monster Rarity: Ultimate Rare Attack: 1600 Defense: 1200 When this card you control is destroyed by a card effect and sent to the Graveyard

Set: Structure Deck: Machine Re-Volt Card type: Continuous Spell Rarity: Common Attack: 0 Defense: 0 Each face-up "Ancient Gear" monster gains 300 ATK

Forerunner of the Legion [Rivals of Ixalan] Nightmare Horror then you can Special SummonSet: Rivals of Ixalan Type: Creature Vampire Knight Rarity: Uncommon Cost: {2}{W} When Forerunner of the Legion enters the battlefield, you may search your library for a Vampire card, reveal it, then shuffle and put that card on top. Whenever another Vampire enters the battlefield under your control, target creature gets +1 +1 until end of turn.