Chromium [Legends] Core Set 2020 Prerelease Promos and I will watch for

and I will watch for evil's creep

you own the land

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

as if it had always known

Choose any number of artifact and/or land cards revealed this way

Chromium [Legends] Core Set 2020 Prerelease Promos and I will watch forSet: Legends Type: Legendary Creature Elder Dragon Rarity: Rare Cost: {2}{W}{W}{U}{U}{B}{B} Flying Rampage 2 (Whenever this creature becomes blocked, it gets +2 +2 until end of turn for each creature blocking it beyond the first.) At the beginning of your upkeep, sacrifice Chromium unless you pay {W}{U}{B}.