: Add .
, : Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

, Pay 1 life: Add one mana of any color.

: Add .
: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.

Protection from multicolored
Whenever an opponent casts a multicolored spell, you gain 1 life.

Whenever a player casts a spell with mana value 3 or less, Eidolon of the Great Revel deals 2 damage to that player.

Play with the top card of your library revealed.
You may play lands from the top of your library.
Landfall — Whenever a land you control enters, you gain 1 life.

( represents colorless mana.)
When Matter Reshaper dies, reveal the top card of your library. You may put that card onto the battlefield if it's a permanent card with mana value 3 or less. Otherwise, put that card into your hand.

Devoid (This card has no color.)
: Exile another target creature, then return it to the battlefield tapped under its owner's control. ( represents colorless mana.)

Exile any number of target creatures you control. Return those cards to the battlefield under their owner's control at the beginning of the next end step.

( represents colorless mana.)
When Thought-Knot Seer enters, target opponent reveals their hand. You choose a nonland card from it and exile that card.
When Thought-Knot Seer leaves the battlefield, target opponent draws a card.