Mekk-Knight Spectrum Supreme [MP18-EN201] Ultra Rare Trap but those Summoned monsters have

but those Summoned monsters have their effects negated

except "Altergeist" monsters

You can only Special Summon "Red Hared Hasty Horse" once per turn this way

but they cannot attack this turn

Mekk-Knight Spectrum Supreme [MP18-EN201] Ultra Rare Trap but those Summoned monsters haveSet: 2018 Mega Tins Mega Pack Card type: Link Effect Monster Rarity: Ultra Rare Attack: 3000 2+ "Mekk Knight" monsters This card can attack directly if it is the only card in its column. If this card in the Extra Monster Zone points to no monsters, it cannot be destroyed by card effects, also your opponent cannot target it with card effects. You can send 1 other card you control in this card's column to the GY; Special Summon 1 "Mekk Knight" monster