Rin and Seri, Inseparable (Buy-A-Box) [Core Set 2021] Fifth Dawn PDS Units and Space Docks

PDS Units and Space Docks are created with the Construction strategy card

this one might be too cute to resist

tap all lands that player controls that could produce any type of mana that land could produce

you can display the Tin and make an important scene from Yu-Gi-Oh

Rin and Seri, Inseparable (Buy-A-Box) [Core Set 2021] Fifth Dawn PDS Units and Space DocksSet: 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.