
Land
: Add
.
,
: Add one mana of any color in your commander's color identity. If you spend this mana to cast your commander, it enters with a number of additional +1/+1 counters on it equal to the number of times it's been cast from the command zone this game.

Commander-color fixing land in any identity.

Taps for commander colors and gives a counter bonus on cast.

Colorless utility land providing ramp in colorless-friendly decks.

Flexible land producing any color you can access.

Color fixing land for multicolor commander decks.

Tribal land producing commander colors for casting creatures.

Any-color fixing land for commander casting.

Taps for any color to cast multicolor commanders.
The "number of times it's been cast from the command zone" includes the most recent time. For example, the first time you cast your commander from the command zone in a game, if you spent mana from Opal Palace's last ability to do so, it will enter the battlefield with a +1/+1 counter.
If you have two commanders, the last ability adds one mana of any color in their combined color identities.
If Opal Palace's last ability produces two mana (most likely due to Mana Reflection) and you spend them to cast a commander, that commander enters with two counters for each time it's been cast from the command zone this game.
If you don't have a commander, Opal Palace's last ability produces no mana.
If your commander is a card that has no colors in its color identity, Opal Palace's last ability produces no mana. It doesn't produce .