Eldrazi Confluence [Modern Horizons 3 Commander] Nightmare Hydra you can negate the Summon

you can negate the Summon of a monster and destroy it

Set: Hidden Arsenal 6: Omega Xyz Card type: Xyz/Effect Monster Rarity: Secret Rare Attack: 1500 Defense: 1100 2 Level 2 monsters Once per turn: You can detach 1 Xyz Material from this card to target 1 face-up WIND monster you control

{3}{B}: Until end of turn

There are some qualities—some incorporate things

Set: Legacy of Destruction Card type: Effect Monster Rarity: Quarter Century Secret Rare Attack: 1200 Defense: 1200 While you control a monster

Eldrazi Confluence [Modern Horizons 3 Commander] Nightmare Hydra you can negate the SummonSet: Modern Horizons 3 Commander Type: Instant Rarity: Rare Cost: {2}{C}{C} Choose three. You may choose the same mode more than once. Target creature gets +3 3 until end of turn. Exile target nonland permanent, then return it to the battlefield tapped uner its owner's control. Create a 1 1 colorless Eldrazi Scion creature token with "Sacrifice this creature: Add X."