Chromium, the Mutable [Core Set 2019 Prerelease Promos] Avatar They must instruct their Followers

They must instruct their Followers in the wisdom of the mountains through study

and each map can have several scenarios set on it

each with their own unique special abilities

At the beginning of each player's upkeep

Set: Worldwake Type: Legendary Creature — Merfolk Rogue Rare Cost: {1}{U}{U} Islandwalk (This creature can't be blocked as long as defending player controls an Island

Chromium, the Mutable [Core Set 2019 Prerelease Promos] Avatar They must instruct their FollowersSet: Core Set 2019 Prerelease Promos Type: Legendary Creature Elder Dragon Rarity: Mythic Cost: {4}{W}{U}{B} Flash This spell can't be countered. Flying Discard a card: Until end of turn, Chromium, the Mutable becomes a Human with base power and toughness 1 1, loses all abilities, and gains hexproof. It can't be blocked this turn.