Mana Vault (Borderless Alternate Art) [Double Masters 2022] United Other Rats you control have

Other Rats you control have toxic 1

you may search your library for a Plains card

Sacrifice Jeweled Lotus: Add three mana of any one color

Poxwalkers are the victims of the Walking Pox

except it doesn't copy that creature's color and it has "At the beginning of your upkeep

Mana Vault (Borderless Alternate Art) [Double Masters 2022] United Other Rats you control haveSet: Double Masters 2022 Type: Artifact Rarity: Mythic Cost: {1} Mana Vault doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault. At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you. {T}: Add {C}{C}{C}.