Fierce Guardianship [Commander 2020] Kor Artificer Ally when another monster's effect is

when another monster's effect is activated: You can Tribute 1 monster

Set: Odyssey Type: Land Rarity: Uncommon {T}: Add {B}

Counter target spell unless its controller pays {3}

Set: Duelist Alliance Card type: Xyz/Effect Monster Rarity: Ultimate Rare Attack: 2500 Defense: 2100 3 Level 4 monsters While this card has Xyz Material

It's said that he butts in by any means necessary

Fierce Guardianship [Commander 2020] Kor Artificer Ally when another monster's effect isSet: Commander 2020 Type: Instant Rarity: Rare Cost: {2}{U} If you control a commander, you may cast this spell without paying its mana cost. Counter target noncreature spell. "Hunt somewhere else. This is your only warning." Gavi, nest warden