Twiddle [International Collectors' Edition] Forest Plains Assembly Worker still counts as

Assembly Worker still counts as a land but cannot be tapped for mana the turn it comes into play

Set: Rivals of Ixalan Promos Type: Legendary Artifact Rarity: Mythic Cost: {6} Players can't activate planeswalkers' loyalty abilities

it's treated as though it doesn't exist

Set: Prophecy Type: Creature — Avatar Rarity: Rare Cost: {6}{R}{R} If an opponent controls seven or more lands

Set: Ixalan Prerelease Promos Type: Land Rarity: Rare Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island

Twiddle [International Collectors' Edition] Forest Plains Assembly Worker still counts asSet: International Collectors' Edition Type: Instant Rarity: Common Cost: {U} You may tap or untap target artifact, creature, or land.