Deckbuilding Rules

In a game of Explorer each player must have two different decks.

Your main deck has a 60 card minimum and there is no maximum (the usual rules of being able to shuffle your deck by yourself apply).

Your extra deck - the Explorer Deck - must have 10 cards in it. No more, no less.

Your main deck is built much the same way you build a regular Magic deck: you choose what cards to put in it (including lands) and there are no color or type restrictions.

But there are two exceptions:

Exception 1: Creatures and Artifacts must obey the Singleton rule.
This means you can only have one copy of each creature or artifact you put in your deck. This rule doesn't apply to cards that explicitly state otherwise (example: Relentless Rats).

Exception 2: You can only use basic lands.
When adding the lands you need to cast your spells, you can only choose from the 6 basic lands: Plains, Island, Swamp, Forest, Mountain or Wastes. The non-basic lands go into the Explorer Deck (see below).

The Explorer Deck serves a simple function: whenever you move your creatures into an unoccupied zone for the first time, you draw a card from the Explorer Deck and place it face-up in that zone. These cards represent the new terrain your creatures discover, explore and claim. But you can also use their abilities so build your Explorer Deck carefully.

Your Explorer Deck can only have 10 non-basic lands. This is the only rule.