Beast Within [Commander 2020] Zombie Barbarian while both have "Gravekeeper's" monster

while both have "Gravekeeper's" monster and "Necrovalley" are on the field: Negate the activation

Set: 2017 Mega-Tins Mega Pack Card type: Toon/Effect Monster Rarity: Super Rare Attack: 2500 Defense: 2100 Cannot attack the turn it is Summoned

Set: Mystery Booster Type: Instant Rarity: Uncommon Cost: {2}{U} Counter target spell unless its controller pays {1} for each card in your graveyard

inflict damage to your opponent equal to the ATK of that face-up monster

Beast Within [Commander 2020] Zombie Barbarian while both have "Gravekeeper's" monsterSet: Commander 2020 Type: Instant Rarity: Uncommon Cost: {2}{G} Destroy target permanent. Its controller creates a 3 3 green Beast creature token. "Monsters dwell in every heart. We only think civilization tames them." Euphemia, Nexus watcher