Karn, Scion of Urza [Dominaria Prerelease Promos] Rat Warrior you may search your library

you may search your library for a Plains card

Titania is ascendant

but a thick

Set: Shadows over Innistrad Type: Enchantment Rarity: Rare Cost: {1}{G} Creatures you control have "{T}: Add one mana of any color

Set: Chronicles Type: Land Rarity: Rare Whenever City of Brass becomes tapped

Karn, Scion of Urza [Dominaria Prerelease Promos] Rat Warrior you may search your librarySet: Dominaria Prerelease Promos Type: Legendary Planeswalker Karn Rarity: Mythic Cost: {4} +1: Reveal the top two cards of your library. An opponent chooses one of them. Put that card into your hand and exile the other with a silver counter on it. 1: Put a card you own with a silver counter on it from exile into your hand. 2: Create a 0 0 colorless Construct artifact creature token with "This creature gets +1 +1 for each artifact you control."