Rin and Seri, Inseparable (Buy-A-Box) [Core Set 2021] Zendikar You may spend blue mana

You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities

When The Scarab God dies

Set: Stronghold Type: Creature — Human Druid Rarity: Rare Cost: {1}{G} {G}

Broad prairies feed the human sanctuary of Drannith and conceal a network of caverns where giant cats make their dens

You may cast a spell with mana value 5 or less from your hand without paying its mana cost

Rin and Seri, Inseparable (Buy-A-Box) [Core Set 2021] Zendikar You may spend blue manaSet: Core Set 2021 Type: Legendary Creature Dog Cat Rarity: Mythic Cost: {1}{R}{G}{W} Whenever you cast a Dog spell, create a 1 1 green Cat creature token. Whenever you cast a Cat spell, create a 1 1 white Dog creature token. {R}{G}{W}, {T}: Rin and Seri, Inseparable deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.